1. The utility model provides a synchronous quick inspection robot of many mycotoxins which characterized in that: comprises a liquid adding device (3), a displacement driving device (2) and a reaction detecting device (1);

the liquid adding device (3) comprises a combined liquid tank (19) for containing a sample liquid to be detected and a plurality of antibody liquids and a liquid adding pump (18) for quantitatively pumping the sample liquid to be detected and the antibody liquids; the combined liquid tank (19) comprises a liquid tank for containing a sample liquid of the sample liquid and a plurality of antibody liquid tanks (34) for containing antibody liquid; the antibody liquid contains an antibody with weak radioactivity, and the antibody can specifically immunoreaction with the target mycotoxin contained in the sample liquid to generate a colloidal precipitate;

the displacement driving device (2) comprises a driving device body (10) and a plurality of sliding blocks (13) which can slide along the radial direction of the driving device body (10); a reaction basal membrane (12) used for providing a reaction site for specific immune reaction is fixed at the front end of the slide block (13); the reaction basement membrane (12) is made of porous materials with strong water absorption;

the reaction detection device (1) comprises a plurality of combined feeding units (9) for dripping antibody liquid and sample liquid to the reaction basement membrane (12), a plurality of elution dripping units (8) for eluting the reaction basement membrane (12) after the specific immunoreaction is completed, and a plurality of radioactivity detection units (7) for detecting radioactivity of the eluted reaction basement membrane (12).

2. The multi-mycotoxin synchronous rapid inspection robot of claim 1, characterized in that: the displacement driving device (2) further comprises a groove disc (11), a locking pressing cylinder (14), a first spring (15) and a first torsion spring (16); the driving device body (10) is of a disc-shaped structure, the driving device body (10) is provided with a central core shaft (10c), and a clamping pin (10b) is arranged on the peripheral wall of the core shaft (10c) in an outward protruding mode; guide grooves (10a) for guiding the sliding blocks (13) are uniformly distributed in the driving device body (10) along the circumferential direction, and the sliding blocks (13) are correspondingly connected in the guide grooves (10a) in a sliding mode; the sliding block (13) is also provided with a sliding hinge part (13 b); a tubular boss is arranged in the middle of the groove disc (11), a first through hole (11b) is formed in the middle of the tubular boss, and a lock pin (11c) is arranged on the outer cylindrical surface of the tubular boss in a protruding mode; the groove disc (11) is rotatably connected to the mandrel (10c) through a first through hole (11b), and a plurality of driving grooves (11a) which are in sliding hinge connection with the sliding hinge parts (13b) are formed in the disc surface of the groove disc (11); a first torsion spring (16) is arranged between the grooved disc (11) and the driving device body (10), and two ends of the first torsion spring (16) are respectively connected with the grooved disc (11) and the driving device body (10);

a locking pressure barrel (14) is further sleeved on the mandrel (10c), and a first spring (15) is arranged between the locking pressure barrel (14) and the driving device body (10); the locking pressure cylinder (14) is of a cylindrical structure, and the left side and the right side of the inner wall of the locking pressure cylinder are respectively provided with a rotation stopping clamping groove (14a) which is used for being in sliding fit with the clamping pin (10b) and limiting the locking pressure cylinder (14) to rotate; and the front side and the rear side of the inner wall of the locking pressure cylinder (14) are symmetrically provided with locking grooves which are used for being in sliding fit with the lock pin (11c) and driving the groove disc (11) to rotate.

3. The multi-mycotoxin synchronous rapid inspection robot of claim 1, characterized in that: the locking groove is of a circulating closed structure, and is sequentially connected with a first section (14b), a second section (14c), a third section (14e), a fourth section (14g), a fifth section (14h), a sixth section (14i) and a seventh section (14j) from bottom to top in a clockwise direction, a first locking point (14d) used for locking the lock pin (11c) is arranged between the second section (14c) and the third section (14e), and a second locking point (14f) used for locking the lock pin (11c) is arranged between the third section (14e) and the fourth section (14 g);

when the locking pressure cylinder (14) moves downwards, the lock pin (11c) is clamped into the locking groove by the first section (14b), along with the downward movement of the locking pressure cylinder (14), an inclined surface inclined downwards in the second section (14c) is firstly contacted with the lock pin (11c), the lock pin (11c) is guided to enter the second section (14c), and along with the downward movement of the locking pressure cylinder (14), the lock pin (11c) sequentially passes through the first locking point (14d), the third section (14e), the second locking point (14f) and the fourth section (14 g); when the locking pressure cylinder (14) descends to the lowest point, the lock pin (11c) is positioned in the fifth section (14h), then the locking pressure cylinder (14) ascends, returns to the first section (14b) through the sixth section (14i) and the seventh section (14j) and is separated from the locking pressure cylinder (14).

4. The multi-mycotoxin synchronous rapid inspection robot of claim 3, wherein: the liquid adding device (3) also comprises a liquid adding pump (18) for quantitatively pumping the antibiotic liquid; the charging pump (18) comprises a pump body (28), a second plunger disc (26), a third one-way valve (31), a fourth one-way valve (32), a fourth spring (27) and a second hose (33); a plurality of second cavities (28b) are uniformly distributed on the bottom end face of the pump body (28); a first liquid inlet hole communicated with the second cavity (28b) is formed in the top of the second cavity (28b), and the third one-way valve (31) is installed in the second liquid inlet hole; a plurality of plunger bodies (26b) corresponding to the second cavity (28b) are arranged on the periphery of the second plunger disc (26), and a second liquid outlet channel is arranged in each plunger body; the fourth one-way valve (32) is arranged in the second liquid outlet channel of the plunger body (26 b); the third one-way valve (31) and the fourth one-way valve (32) are arranged in the same direction; one end of the second hose (33) is fixedly connected to the second liquid outlet channel of the plunger body (26b), and the other end of the second hose is connected to the combined feeding unit (9); the plunger bodies (26b) are movably inserted into the second cavities (28b) in a one-to-one corresponding mode, and the second plunger disc (26) is elastically connected with the pump body (28) through a fourth spring (27).

5. The multi-mycotoxin synchronous rapid inspection robot of claim 4, wherein: the liquid adding device (3) also comprises a plunger assembly (17); the plunger assembly (17) comprises a first one-way valve (20), a floating plunger (21), a second spring (22), a first plunger disc (23), a third spring (24) and a first hose (25); a plurality of first cavities (28a) are uniformly distributed on the bottom end face of the pump body (28); a first liquid inlet hole communicated with the first cavity (28b) is formed in the top of the first cavity (28a), and the second one-way valve (29) is fixedly installed in the first liquid inlet hole; a first boss (23b) used for abutting against the bottom surface of the second plunger disc (26) is arranged in the middle of the first plunger disc (23); a plurality of guide columns (23a) which correspond to the first cavities (28a) in position one by one are arranged on the periphery of the first plunger disc (23); a first liquid outlet channel is arranged in the guide column; the floating plungers (21) are sleeved on the guide columns (23a) in a sliding mode, and the floating plungers (21) are elastically connected with the guide columns (23a) through second springs (22); the first one-way valve (20) is fixedly arranged in the floating plunger (21); the first check valve (20) and the second check valve (29) are installed in the same direction; the floating plungers (21) are movably inserted into the first cavities (28a) in a one-to-one correspondence mode, and the first plunger disc (23) is elastically connected with the second plunger disc (26) through a third spring (24); the third spring (24) is less stiff than the fourth spring (27), the fourth spring (27) is less stiff than the first spring (15); one end of the first hose (25) is fixedly connected to the first liquid outlet channel, and the other end of the first hose is connected to the combined feeding unit (9).

6. The multi-mycotoxin synchronous rapid inspection robot of claim 1, characterized in that: the reaction detection device (1) also comprises a bracket (5) and a waste liquid groove (6); the device is characterized in that the support (5) is fixedly connected to the top of the waste liquid tank (6), a profile hole (5a) matched with the liquid adding device (3) is formed in the middle of the support (5), a plurality of L-shaped supporting arms are uniformly distributed on the periphery of the support (5), and a combined feeding unit (9), an elution dropping unit (8) and a radioactivity detection unit (7) are sequentially arranged on each supporting arm along the radial direction outwards; the top of the elution dropping unit (8) is also fixedly provided with an elution liquid tank (4) used for containing eluent.

7. The multi-mycotoxin synchronous rapid inspection robot of claim 1, characterized in that: the reaction detection device (1) also comprises a bracket (5) and a waste liquid groove (6); the device is characterized in that the support (5) is fixedly connected to the top of the waste liquid tank (6), a profile hole (5a) matched with the liquid adding device (3) is formed in the middle of the support (5), a plurality of L-shaped supporting arms are uniformly distributed on the periphery of the support (5), and a combined feeding unit (9), an elution dropping unit (8) and a radioactivity detection unit (7) are sequentially arranged on each supporting arm along the radial direction outwards; the top of the elution dropping unit (8) is also fixedly provided with an elution liquid tank (4) used for containing eluent.

8. The multi-mycotoxin synchronous rapid inspection robot of claim 1, characterized in that: the reaction detection device (1) also comprises a bracket (5) and a waste liquid groove (6); the device is characterized in that the support (5) is fixedly connected to the top of the waste liquid tank (6), a profile hole (5a) matched with the liquid adding device (3) is formed in the middle of the support (5), a plurality of L-shaped supporting arms are uniformly distributed on the periphery of the support (5), and a combined feeding unit (9), an elution dropping unit (8) and a radioactivity detection unit (7) are sequentially arranged on each supporting arm along the radial direction outwards; the top of the elution dropping unit (8) is also fixedly provided with an elution liquid tank (4) used for containing eluent.

9. The method for synchronously detecting multiple mycotoxins in a sample solution by the multi-mycotoxin synchronous rapid detection robot as claimed in any one of claims 1 to 6, comprising the following steps of:

s1, adding a sample solution to be tested into the sample solution tank (33), and fixedly installing the reaction base membrane (12) at the front end of the sliding block (13);

s2, driving the slide block (13) to drive the reaction base membrane (12) to move to the lower part of the combined feeding unit (9) through the displacement driving device (2), pumping a sample liquid with a fixed volume to the combined feeding unit (9) through the liquid adding device (3) and dropwise adding the sample liquid on the reaction base membrane (12);

s3, after the sample solution is completely diffused, pumping excessive antibody solution to a combined feeding unit (9) through a liquid feeding device (3) and dropwise adding the excessive antibody solution on the reaction base membrane (12);

s4, after the dropwise addition is completed, waiting for the sample solution and the antibody solution to fully generate specific immunological binding reaction, and generating colloidal precipitate;

s5, after the immune combination reaction is finished, driving the slide block (13) to drive the reaction basement membrane (12) to move to the lower part of the elution dropping liquid unit (8) through the displacement driving device (2), and eluting the antibody liquid which does not participate in the reaction on the reaction basement membrane (12) through the elution dropping liquid unit (8);

s6, after the elution is finished, the displacement driving device (2) drives the slide block (13) to drive the reaction basement membrane (12) to move to the position below the radioactivity detection unit (7), and the radioactivity intensity of the reaction basement membrane (12) is detected;

and S7, calculating the concentration of the target mycotoxin in the sample solution to be tested according to the radioactivity value of the colloidal precipitate in the reaction basement membrane (12).

Background

At present, two methods, namely a chromatography method and a test paper enzyme-linked immunosorbent assay method, are mainly adopted for detecting the mycotoxins, wherein the chromatography method needs to process a sample before detection and then uses a chromatograph for detection, and instruments used in the detection process have large volume and weight, are only suitable for laboratory detection and cannot be applied to an application scene of simultaneously carrying out rapid quantitative detection on various mycotoxins; the enzyme-linked immunosorbent assay with test paper has limited antibody amount, and can not combine with target mycotoxin in the sample sufficiently, resulting in poor detection result accuracy and failure in accurate quantitative detection of mycotoxin content.

Disclosure of Invention

The invention aims to overcome the defects and provide a multi-mycotoxin synchronous rapid inspection robot capable of simultaneously and quantitatively detecting multiple mycotoxins.

In order to achieve the purpose, the invention adopts the following specific scheme:

a multi-mycotoxin synchronous quick inspection robot comprises a liquid adding device, a displacement driving device and a reaction detection device;

the liquid adding device comprises a combined liquid tank for containing a sample liquid to be detected and a plurality of antibody liquids and a liquid adding pump for quantitatively pumping the sample liquid to be detected and the antibody liquids; the combined liquid tank comprises a liquid tank for containing a sample liquid of the sample liquid and a plurality of antibody liquid tanks for containing antibody liquid; the antibody liquid contains an antibody with weak radioactivity, and the antibody can specifically immunoreaction with the target mycotoxin contained in the sample liquid to generate a colloidal precipitate;

the displacement driving device comprises a driving device body and a plurality of sliding blocks which can slide along the radial direction of the driving device body; a reaction basal membrane used for providing a reaction site for specific immunoreaction is fixed at the front end of the sliding block; the reaction basement membrane is made of porous materials with strong water absorption;

the reaction detection device comprises a plurality of combined feeding units for dripping antibody liquid and sample liquid to the reaction basement membrane, a plurality of elution dripping units for eluting the reaction basement membrane after the specific immunoreaction is completed, and a plurality of radioactivity detection units for performing radioactivity detection on the eluted reaction basement membrane.

The invention further provides that the displacement driving device also comprises a grooved disc, a locking pressure cylinder, a first spring and a first torsion spring; the driving device body is of a disc-shaped structure and is provided with a central mandrel, and clamping pins are arranged on the peripheral wall of the mandrel in an outward protruding mode; the driving device body is uniformly provided with guide grooves for guiding the sliding blocks along the circumferential direction, and the sliding blocks are correspondingly connected in the guide grooves in a sliding manner; the sliding block is also provided with a sliding hinge part; a tubular boss is arranged in the middle of the groove disc, a first through hole is formed in the middle of the tubular boss, and a lock pin is arranged on the outer cylindrical surface of the tubular boss in an outward protruding mode; the groove disc is rotatably connected to the mandrel through a first through hole, and a plurality of driving grooves which are slidably hinged with the sliding hinge parts are formed in the disc surface of the groove disc; a first torsion spring is arranged between the grooved disc and the driving device body, and two ends of the first torsion spring are respectively connected with the grooved disc and the driving device body;

the mandrel is also sleeved with a locking pressing barrel, and a first spring is arranged between the locking pressing barrel and the driving device body; the locking pressing cylinder is of a cylindrical structure, and the left side and the right side of the inner wall of the locking pressing cylinder are respectively provided with a rotation stopping clamping groove which is used for being in sliding fit with the clamping pin and limiting the rotation of the locking pressing cylinder; and the front side and the rear side of the inner wall of the locking pressure cylinder are symmetrically provided with locking grooves which are in sliding fit with the lock pin and drive the grooved disc to rotate.

The locking groove is of a circulating closed structure, and is sequentially connected with a first section, a second section, a third section, a fourth section, a fifth section, a sixth section and a seventh section from top to bottom in a clockwise direction, a first locking point for locking the lock pin is arranged between the second section and the third section, and a second locking point for locking the lock pin is arranged between the third section and the fourth section;

when the locking pressure cylinder descends, the lock pin is clamped into the locking groove from the first section, an inclined surface inclining downwards in the second section firstly contacts with the lock pin along with the descending of the locking pressure cylinder, the lock pin is guided to enter the second section, and the lock pin sequentially passes through the first locking point, the third section, the second locking point and the fourth section along with the descending of the locking pressure cylinder; when the locking pressure cylinder descends to the lowest point, the lock pin is positioned in the fifth section, then the locking pressure cylinder ascends, returns to the first section through the sixth section and the seventh section and is separated from the locking pressure cylinder.

The invention further provides the liquid adding device which also comprises a liquid adding pump for quantitatively pumping the anti-body fluid; the liquid feeding pump comprises a pump body, a second plunger disc, a third one-way valve, a fourth spring and a second hose; a plurality of second cavities are uniformly distributed on the end surface of the bottom of the pump body; the top of the second cavity is provided with a first liquid inlet hole communicated with the second cavity, and the third one-way valve is arranged in the second liquid inlet hole; a plurality of plunger bodies corresponding to the second cavity are arranged on the periphery of the second plunger disc, and a second liquid outlet channel is arranged in each plunger body; the fourth one-way valve is arranged in the second liquid outlet channel of the plunger body; the third one-way valve and the fourth one-way valve are arranged in the same direction; one end of the second hose is fixedly connected to the second liquid outlet channel of the plunger body, and the other end of the second hose is connected to the combined feeding unit; the plunger bodies are movably inserted into the second cavities in a one-to-one correspondence mode respectively, and the second plunger disc is elastically connected with the pump body through a fourth spring.

The invention further provides the liquid adding device which also comprises a plunger assembly; the plunger assembly comprises a first one-way valve, a floating plunger, a second spring, a first plunger disc, a third spring and a first hose; a plurality of first cavities are uniformly distributed on the end surface of the bottom of the pump body; the top of the first cavity is provided with a first liquid inlet hole communicated with the first cavity, and the second one-way valve is fixedly arranged in the first liquid inlet hole; a first boss used for abutting against the bottom surface of the second plunger disc is arranged in the middle of the first plunger disc; a plurality of guide columns which correspond to the first cavity in position one to one are arranged on the periphery of the first plunger disc; a first liquid outlet channel is arranged in the guide column; the floating plungers are sleeved on the guide columns in a sliding mode and are elastically connected with the guide columns through second springs; the first one-way valve is fixedly arranged in the floating plunger; the first one-way valve and the second one-way valve are arranged in the same direction; the floating plungers are movably inserted into the first cavities in a one-to-one correspondence mode respectively, and the first plunger disc is elastically connected with the second plunger disc through a third spring; the third spring rate is less than the fourth spring rate, which is less than the first spring rate; one end of the first hose is fixedly connected to the first liquid outlet channel, and the other end of the first hose is connected to the combined feeding unit.

The invention further provides a reaction detection device which also comprises a bracket and a waste liquid groove; the support is fixedly connected to the top of the waste liquid tank, a profile hole matched with the liquid adding device is formed in the middle of the support, a plurality of L-shaped supporting arms are uniformly distributed on the periphery of the support, and a combined feeding unit, an elution liquid dropping unit and a radioactivity detection unit are sequentially arranged on each supporting arm along the radial direction; and the top of the elution dropping liquid unit is also fixedly provided with an elution liquid groove for containing eluent.

The invention has the beneficial effects that:

1. the method has the advantages that the colloidal precipitate is generated by the specific immunoreaction of the radiolabeled antibody and the target mycotoxin in the sample solution, and the high-sensitivity quantitative detection on the concentration of the mycotoxin in the sample solution can be realized quickly by performing the radioactive quantitative detection on the generated colloidal precipitate;

2. meanwhile, a plurality of groups of reaction detection devices are arranged, and a porous water-absorbing reaction base membrane is used as a reaction site, so that colloidal precipitates produced by specific immunoreactions can be conveniently separated, the structure of the kit is more compact, and the kit is convenient to carry so as to adapt to an application scene of simultaneously carrying out rapid quantitative detection on a plurality of mycotoxins;

3. the liquid adding device is driven to pump out sample liquid and antibody liquid by adopting a manual pressing mode, and the slide block is driven and locked so as to change the position of the reaction base membrane, so that the dependence of the device on external energy sources is avoided, and the use flexibility is improved;

the method for synchronously detecting the multiple mycotoxins in the sample solution is obtained by utilizing any scheme of the multiple mycotoxin synchronous rapid detection robot, and comprises the following steps:

s1, adding a sample solution to be tested into a sample solution tank, and fixedly installing a reaction base membrane at the front end of the sliding block;

s2, driving the slide block to drive the reaction base membrane to move to the lower part of the combined feeding unit through the displacement driving device, pumping a sample liquid with a fixed volume to the combined feeding unit through the liquid feeding device and dripping the sample liquid on the reaction base membrane;

s3, after the sample solution is completely diffused, pumping excessive antibody solution to the combined feeding unit through the liquid feeding device and dropwise adding the excessive antibody solution on the reaction basement membrane;

s4, after the dropwise addition is completed, waiting for the sample solution and the antibody solution to fully generate specific immunological binding reaction, and generating colloidal precipitate; (ii) a

S5, after the immune combination reaction is completed, driving the slide block to drive the reaction base membrane to move to the lower part of the elution dropping liquid unit through the displacement driving device, and eluting the antibody liquid which does not participate in the reaction on the reaction base membrane through the elution dropping liquid unit;

s6, after the elution is finished, driving the slide block to drive the reaction basement membrane to move to the lower part of the radioactivity detection unit through the displacement driving device, and detecting the radioactivity intensity of the reaction basement membrane;

and S7, calculating the concentration of the target mycotoxin in the sample solution to be tested according to the radioactivity value of the colloidal precipitate in the reaction basement membrane.

Compared with the existing detection method, the method has the following beneficial effects:

1. the mycotoxin in the sample solution is combined by adopting a specific immunoreaction principle, the complex treatment of the sample solution is not needed before detection, the operation is simple, and the practicability is stronger.

2. The colloidal precipitate is generated by specific immunological binding reaction between the antibody liquid which is excessively added and the target mycotoxin in the sample liquid, and the content of the target mycotoxin in the antibody liquid is judged by quantitatively detecting the radioactivity of the generated colloidal precipitate, so that the sensitivity is high, and the detection accuracy is high.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a perspective view of the reaction detecting unit of the present invention;

FIG. 3 is a perspective view, in half section, of the displacement drive of the present invention;

FIG. 4 is a cross-sectional view of the locking barrel of the present invention;

FIG. 5 is a schematic view of the movement of the locking pin in the track during use of the present invention;

FIG. 6 is an exploded view of the charging device of the present invention;

FIG. 7 is a perspective view in half section of the plunger assembly of the present invention;

FIG. 8 is a perspective view, in half section, of the charge pump of the present invention;

FIG. 9 is a perspective view of the composite feed trough of the present invention;

FIG. 10 is a schematic view of the detection method of the present invention

Description of reference numerals: 1. a reaction detection device; 2. a displacement drive device; 3. a liquid adding device; 4. an eluent tank; 5. a support; 5a, profile holes; 6. a waste liquid tank; 7. a radioactivity detecting unit; 8. an elution dropping unit; 9. a combined feeding unit; 10. a driving device body; 10a, a guide groove; 10b, a bayonet lock; 10c, a mandrel; 11. a grooved disc; 11a, a driving groove; 11b, a first through hole; 11c, a lock pin; 12. reaction of the basement membrane; 13. a slider; 13a, a guide part; 13b, a sliding hinge; 14. locking the pressing cylinder; 14a, a rotation stopping clamping groove; 14b, a first section; 14c, a second section; 14d, a first lock point; 14e, a third section; 14f, a second locking point; 14g, a fourth segment; 14h, a fifth section; 14i, a sixth section; 14j, a seventh section; 15. a first spring; 16. a first torsion spring; 17. a plunger assembly; 18. a liquid adding pump; 19. a combined liquid tank; 20. a first check valve; 21. a floating plunger; 22. a second spring; 23. a first plunger disc; 23a, a guide post; 23b, a first boss; 23c, a second through hole; 24. a third spring; 25. a first hose; 26. a second plunger plate; 26a, a third through hole; 26b, a plunger body; 27. a fourth spring; 28. a pump body; 28a, a first cavity; 28b, a second cavity; 29. a second one-way valve; 30. a limiting rod; 31. a third check valve; 32. a fourth check valve; 33. a second hose; 34. an antibody liquid bath; 33. and a sample liquid tank.

Detailed Description

The invention will be described in further detail with reference to the following figures and specific examples, without limiting the scope of the invention.

As shown in fig. 1 to 9, the multi-mycotoxin synchronous rapid inspection robot of the present embodiment includes a liquid adding device 3, a displacement driving device 2 and a reaction detecting device 1;

the liquid adding device 3 comprises a combined liquid tank 19 for containing a sample liquid to be detected and a plurality of antibody liquids and a liquid adding pump 18 for quantitatively pumping out the sample liquid to be detected and the antibody liquids; the combined liquid tank 19 comprises a liquid tank for containing a sample liquid of the sample liquid and a plurality of antibody liquid tanks 34 for containing antibody liquid; the antibody liquid contains an antibody with weak radioactivity, and the antibody can specifically immunoreaction with the target mycotoxin contained in the sample liquid to generate a colloidal precipitate;

the displacement driving device 2 comprises a driving device body 10 and a plurality of sliding blocks 13 which can slide along the radial direction of the driving device body 10; a reaction base membrane 12 for providing a reaction site for a specific immune reaction is fixed at the front end of the slide block 13; the reaction base membrane 12 is made of a porous material having strong water absorption;

the reaction detecting device 1 includes a plurality of combined feeding units 9 for dropping an antibody liquid and a sample liquid to the reaction base membrane 12, a plurality of elution dropping units 8 for eluting the reaction base membrane 12 after completion of a specific immunoreaction, and a plurality of radioactivity detecting units 7 for detecting radioactivity of the eluted reaction base membrane 12.

Specifically, the displacement driving device 2 is fixedly connected to the bottom of the reaction detection device 1, the combined feeding unit 9, the elution dropping unit 8 and the radioactivity detection unit 7 of the liquid feeding device 3 are all located above the reaction base film 12, and the displacement driving device 2 drives the sliding block 13 to drive the reaction base film 12 to move along the driving device body 10 from inside to outside in the radial direction and sequentially pass through the combined feeding unit 9, the elution dropping unit 8 and the radioactivity detection unit 7 from below; the liquid adding device 3 is sleeved on the top of the reaction detection device 1 in a sliding manner, and antibody liquid and reaction liquid in the combined liquid box are pumped into the combined feeding unit 9;

specifically, the reaction basement membrane 12 is preferably a nitrocellulose membrane or a glass fiber membrane, and the thickness is selected within the range of 1.2-2.5mm according to the dosage of the sample solution;

the specific working mode of the embodiment is as follows: adding antibody liquid into an antibody liquid groove 34, and fixing the reaction base membrane 12 at the front end of the sliding block 13; after the reaction is finished, the displacement driving device 2 drives the slide block 13 to drive the reaction base film 12 to move to the lower part of the combined feeding unit 9; after the completion, pumping a fixed volume of sample liquid from the sample liquid tank 33 into the combined feeding unit 9 through the liquid adding device 3, and dropping the sample liquid onto the reaction base film 12 through the combined feeding unit 9; after the sample solution on the reaction base membrane 12 is fully diffused, pumping the test antibody solution in the antibody solution tank 34 with excessive volume into the combined feeding unit 9 through the solution adding device 3, and dropwise adding the solution onto the reaction base membrane 12 through the combined feeding unit 9; standing for 5-8min after the dropwise addition is completed, after the antibody in the antibody liquid and the target mycotoxin in the sample solution fully perform a specific immune reaction to generate a colloidal precipitate, driving the slide block 13 to drive the reaction base membrane 12 to move to the lower part of the elution liquid dropping unit 8 through the displacement driving device 2, and eluting the antibody liquid which is adsorbed in the reaction base membrane 12 and does not participate in the specific immune binding reaction through the elution liquid dropping unit 8, so that the interference of the antibody liquid which does not participate in the specific immune binding reaction on the radioactivity detection result is avoided; in this process, since the colloidal precipitate generated by the specific immunoreaction of the target mycotoxin and the antigen is attached to the inside of the porous reaction base membrane 12, the generated colloidal precipitate is not separated from the reaction base membrane 12 in the elution process; after the elution is finished, the displacement driving device 2 drives the slide block 13 to drive the reaction base membrane 12 to move to the lower part of the radioactivity detection unit 7, and the radioactivity detection unit 7 detects the radioactivity intensity of the colloidal precipitate in the reaction base membrane 12; the radioactivity of the colloidal precipitate is calculated to obtain the concentration of the mycotoxin in the sample solution.

The beneficial effect of this embodiment does: by taking the porous reaction basement membrane 12 as a reaction site, carrying out specific immunoreaction by using an antibody and target mycotoxin to generate colloidal precipitate, eluting antibody liquid participating in the specific immunoreaction in the reaction basement membrane 12 under the condition that the colloidal precipitate is fixed by the porous reaction basement membrane 12, then detecting the radioactive strength of the colloidal precipitate in the basement membrane by using the radioactive detection unit 7, and judging the amount of the target mycotoxin combined by the antibody according to the radioactive strength, thereby realizing high-sensitivity synchronous quantitative detection on various mycotoxins; the detection robot has the advantages of compact structure, portability and high detection speed, and can be applied to application scenes of rapid quantitative detection of various mycotoxins.

Based on the above embodiment, further, the displacement driving device 2 further includes a slotted disc 11, a locking pressure cylinder 14, a first spring 15, and a first torsion spring 16; the driving device body 10 is of a disc-shaped structure, the driving device body 10 is provided with a central core shaft 10c, and a bayonet pin 10b is convexly arranged on the peripheral wall of the core shaft 10 c; the driving device body 10 is uniformly provided with guide grooves 10a for guiding the sliding blocks 13 along the circumferential direction, and the sliding blocks 13 are correspondingly connected in the guide grooves 10a in a sliding manner; the sliding block 13 is also provided with a sliding hinge part 13 b; a tubular boss is arranged in the middle of the groove disc 11, a first through hole 11b is formed in the middle of the tubular boss, and a lock pin 11c is arranged on the outer cylindrical surface of the tubular boss in an outward protruding mode; the groove disc 11 is rotatably connected to the mandrel 10c through a first through hole 11b, and a plurality of driving grooves 11a which are slidably hinged with the sliding hinge parts 13b are arranged on the disc surface of the groove disc 11; a first torsion spring 16 is arranged between the grooved disc 11 and the driving device body 10, and two ends of the first torsion spring 16 are respectively connected with the grooved disc 11 and the driving device body 10;

a locking pressure cylinder 14 is further sleeved on the mandrel 10c, and a first spring 15 is arranged between the locking pressure cylinder 14 and the driving device body 10; the locking pressing cylinder 14 is of a cylindrical structure, and the left side and the right side of the inner wall of the locking pressing cylinder are respectively provided with a rotation stopping clamping groove 14a which is used for being in sliding fit with the clamping pin 10b and limiting the locking pressing cylinder 14 to rotate; and locking grooves which are in sliding fit with the lock pins 11c and drive the groove disc 11 to rotate are symmetrically formed in the front side and the rear side of the inner wall of the locking pressure cylinder 14.

Specifically, the driving device body 10 is a disc-shaped structure, a central position on the upper side of the disc surface is provided with a mandrel 10c, and the root of the mandrel 10c is provided with an annular groove for accommodating the first torsion spring 16; a bayonet pin 10b with the axis parallel to the disk surface is arranged on the outer cylindrical surface of the mandrel 10c in an outward protruding mode, and a supporting platform for supporting the displacement driving device 2 is arranged at the central position of the lower side of the disk surface; the top of the mandrel 10c is provided with a mounting hole for mounting a first spring 15; a plurality of guide grooves 10a for guiding the sliding block 13 are uniformly distributed on the upper side of the disk surface along the radial direction;

specifically, the groove disc 11 is of a disc-shaped structure, a tubular boss is arranged on the upper side of the disc surface, a first through hole 11b for being sleeved with the mandrel 10c is formed in the center of the tubular boss, and a lock pin 11c with an axis parallel to the disc surface is arranged on the cylindrical surface on the outer side of the top of the tubular boss; a plurality of involute through grooves corresponding to the positions of the guide grooves 10a are formed in the disc surface of the groove disc 11;

specifically, the bottom of the slider 13 is provided with a guide part 13a which is in sliding fit with the guide groove 10a, the top surface of the guide part 13a is provided with a sliding hinge part 13b which is in sliding hinge joint with the driving groove 11a, the top surface of the sliding hinge part 13b is provided with a cantilever, and the front end of the cantilever is provided with a circular ring-shaped fixed part for fixing the reaction base membrane 12; the reaction base film 12 is fixedly arranged on the inner side of the annular fixed part and can slide along the radial direction of the driving device body 10 under the driving of the sliding block 13; .

When the device works, the locking pressure cylinder 14 is pressed to extrude the first spring 15 to move downwards, the rotation-stopping clamping groove 14a is clamped in the clamping pin 10b to limit the rotation of the locking pressure cylinder 14, the locking pin 11c enters the locking groove along with the further downward movement of the locking pressure cylinder 14, the locking groove drives the groove disc 11 to rotate under the driving of the locking groove, and the sliding block 13 is slidably hinged in the driving groove 11a on the groove disc 11 through the sliding hinge part 13b, so that when the groove disc 11 rotates, the driving sliding block 13 drives the reaction base film 12 to slide along the guide groove 10a, and the reaction base film 12 is transferred among different working positions;

in this embodiment, realize the synchronous drive to all sliders 13 through the mode of pressing, the structure is more compact, through manpower drive, does not rely on the outside to provide energy input, and applicable scene is wider.

Based on the above embodiment, further, the locking groove is of a circular closed structure, and is sequentially connected with a first section 14b, a second section 14c, a third section 14e, a fourth section 14g, a fifth section 14h, a sixth section 14i and a seventh section 14j from top to bottom in a clockwise direction, a first locking point 14d for locking the lock pin 11c is arranged between the second section 14c and the third section 14e, and a second locking point 14f for locking the lock pin 11c is arranged between the third section 14e and the fourth section 14 g;

when the locking pressure cylinder 14 moves downwards, the lock pin 11c is clamped into the locking groove by the first section 14b, along with the downward movement of the locking pressure cylinder 14, a downward inclined surface in the second section 14c is firstly contacted with the lock pin 11c, the lock pin 11c is guided to enter the second section 14c, and along with the downward movement of the locking pressure cylinder 14, the lock pin 11c sequentially passes through a first locking point 14d, a third section 14e, a second locking point 14f and a fourth section 14 g; when the lock cylinder 14 moves down to the lowest point, the lock pin 11c is located in the fifth section 14h, and then the lock cylinder 14 moves up, passes through the sixth section 14i and the seventh section 14j, returns to the first section 14b, and is out of contact with the lock cylinder 14.

In operation, the first section 14b is an access passage for the lock pin 11c, and when the lock pin 11c is located in the section, the first torsion spring 16 is in a free state; as the locking cylinder 14 moves downward, the lock pin 11c enters the second section 14c under the guiding action of the inclined surface inclined downward in the second section 14c, passes through the second section 14c and reaches the first locking point 14 d; in the process, the first torsion spring 16 is twisted and deformed, so that the lock pin 11c has a clockwise movement tendency; when the lock pin 11c enters the third section 14e from the first lock stop 14d, the first torsion spring 16 is further twisted and deformed, so that the lock pin 11c has a clockwise movement tendency; when the lock pin 11c is located at the left side of the first section 14b, namely the second section 14c, the first locking point 14d, the third section 14e, the second locking point 14f and the fourth section 14g, the torsion spring is in a counterclockwise compression state, and the first torsion spring 16 has a tendency of returning to the clockwise direction, so that the lock pin 11c automatically enters the first locking point 14d and the second locking point 14f during the downward movement of the locking pressure cylinder 14; when the locking pressure cylinder 14 moves downwards further, so that the lock pin 11c enters the fourth section 14g, the lock pin 11c is positioned above the inclined plane of the fifth section 14h under the action of the return torsion force of the torsion spring, and along with the upward movement of the locking pressure cylinder 14, the lock pin 11c enters the sixth section 14i under the guiding action of the inclined plane of the fifth section 14h and is separated from the locking groove from the first section 14b under the guiding action of the inclined plane of the seventh section 14 j;

when the lock pin 11c is located at the first locking point 14d, the lock pin 11c is hung on the plane of the locking point, so that the locking pressure cylinder 14 is prevented from moving upwards under the action of the elastic force of the first spring 15, the lock pin 11c and the locking pressure cylinder 14 are locked at the moment, the grooved disc 11 cannot rotate, and the slider 13 is in a locking state at the same time; further pressing the locking pressing cylinder 14, the lock pin 11c enters a second locking point 14f from the third section 14e, in the process, the third section 14e drives the groove 11a and the disc 11 to rotate through the lock pin 11c, the slide block 13 is pushed to the next position, and locking is carried out; and continuously pressing the locking pressure cylinder 14, after the lock pin 11c exceeds the locking surface of the second locking point 14f and enters the fourth section 14g, releasing the pressing force, moving the locking pressure cylinder 14 upwards under the elastic force of the first spring 15, after the lock pin 11c is separated from the locking groove, returning the grooved disc 11 under the torsion force of the first torsion spring 16, and driving the sliding block 13 to return to the position closest to the center of the grooved disc 11.

In this embodiment, through the cooperation of locking groove and lockpin 11c, through the mode of pressing a locking pressure section of thick bamboo 14, realize the fixed point locking to fluted disc 11, and then control slider 13's locking, compact structure, convenient operation, repeated positioning accuracy is high, has improved detection robot's detection convenience and use flexibility.

Based on the above embodiment, further, the liquid adding device 3 further comprises a liquid adding pump 18 for quantitatively pumping the antibiotic liquid; the charging pump 18 comprises a pump body 28, a second plunger disc 26, a third one-way valve 31, a fourth one-way valve 32, a fourth spring 27 and a second hose 33; a plurality of second cavities 28b are uniformly distributed on the end face of the bottom of the pump body 28; a first liquid inlet hole communicated with the second cavity 28b is formed in the top of the second cavity 28b, and the third one-way valve 31 is installed in the second liquid inlet hole; a plurality of plunger bodies 26b corresponding to the second cavity 28b are arranged on the periphery of the second plunger disc 26, and a second liquid outlet channel is arranged in each plunger body; the fourth one-way valve 32 is arranged in the second liquid outlet channel of the plunger body 26 b; the third one-way valve 31 and the fourth one-way valve 32 are installed in the same direction; one end of the second hose 33 is fixedly connected to the second liquid outlet channel of the plunger body 26b, and the other end of the second hose is connected to the combined feeding unit 9; the plurality of plunger bodies 26b are movably inserted into the plurality of second cavities 28b in a one-to-one correspondence manner, and the second plunger disc 26 is elastically connected with the pump body 28 through a fourth spring 27.

Specifically, the middle part of the second plunger disc 26 is also fixedly connected with a limiting rod 30, the tail end of the limiting rod 30 is provided with a limiting boss, the middle part of the pump body 28 is also provided with a through hole matched with the limiting rod 30, the limiting rod 30 is inserted into the through hole, and the stroke of the second plunger disc 26 is limited by the limiting boss and the end face of the through hole in the middle part of the pump body 28;

when the combined charging unit 9 works, the charging pump 18 is pressed to move downwards, after the second plunger disc 26 is contacted with the locking pressure cylinder 14 at the bottom, the pump body 28 presses the fourth spring 27 to move downwards continuously, so that the plunger body 26b presses the second cavity 28b, the volume of the second cavity is reduced, the pressure is increased, and as the third one-way valve 31 and the fourth one-way valve 32 are installed in the same direction, the fourth one-way valve 32 is opened during the volume reduction process of the second cavity 28b, the third one-way valve 31 is closed, and the antibody liquid in the second cavity 28b is conveyed to the combined charging unit 9 through the second hose 33 by virtue of the fourth one-way valve 32; when the charging pump 18 is reset under the action of the elastic force of the fourth spring 27, the plunger body 26b exits the second cavity 28b, the volume of the second cavity 28b is increased, the pressure is reduced, the third one-way valve 31 is opened, the fourth one-way valve 32 is closed, and the antibody liquid in the antibody liquid box is sucked into the second cavity 28 b;

in the embodiment, the antibody liquid is quantitatively pumped by the one-way valve in a pressing mode, so that the conveying amount is more accurate; meanwhile, the device is driven by manpower, does not depend on external energy input, and has higher flexibility and wider application scene.

Based on the above embodiment, further, the liquid adding device 3 further comprises a plunger assembly 17; the plunger assembly 17 comprises a first one-way valve 20, a floating plunger 21, a second spring 22, a first plunger disc 23, a third spring 24 and a first hose 25; a plurality of first cavities 28a are uniformly distributed on the end face of the bottom of the pump body 28; a first liquid inlet hole communicated with the first cavity 28b is formed in the top of the first cavity 28a, and the second one-way valve 29 is fixedly installed in the first liquid inlet hole; a first boss 23b used for abutting against the bottom surface of the second plunger disc 26 is arranged in the middle of the first plunger disc 23; a plurality of guide posts 23a corresponding to the first cavities 28a one by one are arranged on the periphery of the first plunger disc 23; a first liquid outlet channel is arranged in the guide column; the floating plungers 21 are slidably sleeved on the guide columns 23a, and the floating plungers 21 are elastically connected with the guide columns 23a through second springs 22; the first one-way valve 20 is fixedly arranged in the floating plunger 21; the first check valve 20 and the second check valve 29 are installed in the same direction; the floating plungers 21 are movably inserted into the first cavities 28a one by one, and the first plunger disc 23 is elastically connected with the second plunger disc 26 through a third spring 24; the third spring 24 is less stiff than the fourth spring 27, and the fourth spring 27 is less stiff than the first spring 15; one end of the first hose 25 is fixedly connected to the first liquid outlet channel, and the other end of the first hose is connected to the combined feeding unit 9.

Specifically, the second plunger disc 26 is provided with a plurality of through holes for the floating plunger 21 to pass through;

when the liquid charging pump 18 is pressed to move downwards, after the first plunger disc 23 is contacted with the locking pressure cylinder 14 at the bottom, the pump body 28 extrudes the third spring 24 to continuously move the floating plunger 21 downwards to extrude the first cavity 28a, so that the volume of the first cavity is reduced, the pressure is increased, because the first one-way valve 20 and the second one-way valve 29 are installed in the same direction, the third one-way valve 31 is opened in the process of reducing the volume of the first cavity 28a, the second one-way valve 29 is closed, and the sample liquid in the first cavity 28a is conveyed to the combined charging unit 9 through the third one-way valve 31 and the first hose 25; as the pump body 28 is further lowered, the top of the floating plunger 21 contacts the bottom of the first cavity 28a, and the first boss 23b abuts against the bottom surface of the second plunger disc 26; as the pump body 28 is further pushed downwards, the second plunger disc 26 compresses the fourth spring 27 and the second spring 22 under the pressing of the first plunger disc 23, so that the plunger body 26b presses the second cavity 28b to pump the antibody liquid, and the detailed process is described above and is not repeated;

in this embodiment, since the third spring 24 has a lower stiffness than the fourth spring 27, and the fourth spring 27 has a lower stiffness than the first spring 15, the pumping of the sample solution and the pumping of the antibody solution are performed in sequence during the downward movement of the pump body 28; the sequential addition of the sample liquid and the antibody liquid is realized through a pressing mode, the structure is compact, the operation is simple and convenient, and the flexibility of the detection process is improved.

Based on the above embodiment, further, the reaction detecting apparatus 1 further includes a bracket 5 and a waste liquid tank 6; the support 5 is fixedly connected to the top of the waste liquid tank 6, the middle part of the support 5 is provided with a profile hole 5a matched with the liquid adding device 3, the periphery of the support 5 is uniformly distributed with a plurality of L-shaped supporting arms, and each supporting arm is sequentially provided with a combined feeding unit 9, an elution liquid dropping unit 8 and a radioactivity detection unit 7 along the radial direction outwards; the top of the elution dropping unit 8 is also fixedly provided with an elution liquid tank 4 for containing elution liquid.

Specifically, two groups of liquid inlet holes are formed in the combined feeding unit 9, and are respectively connected with the first hose 25 and the second hose 33 of the liquid adding device 3, and injected sample liquid and antibody liquid are atomized and then sequentially sprayed onto the reaction basement membrane 12, so that the diffusion rate of the sample liquid and the antibody liquid in the basement membrane is increased;

an electromagnetic valve is arranged in the specific elution dropping unit 8 and is used for controlling the eluent in the eluent tank 4 to flow out and drop on the reaction base membrane 12 to elute the free antibodies which do not participate in the specific immune binding reaction in the reaction base membrane 12, so that the influence of the free antibodies which do not participate in the specific immune binding reaction in the reaction base membrane 12 on the detection result in the radioactive detection process is avoided; the eluent is preferably deionized water;

a fluorescence sheet, a visible light focusing sheet and a photoelectric sensor are arranged in the radioactivity detection unit 7, the fluorescence sheet is excited by radioactive rays of the base film to emit visible light, the visible light is focused by the visible light focusing sheet and then is projected to the photoelectric sensor to be converted into an electric signal, and therefore the radioactivity of colloidal precipitates in the reaction base film 12 is quantitatively detected;

when the combined charging unit 9 is in operation, when the reaction basement membrane 12 is positioned below the combined charging unit 9, the combined charging unit 9 atomizes and sprays the sample solution on the surface of the reaction basement membrane 12, and after the sample solution completely diffuses into the reaction basement membrane 12, the combined charging unit 9 atomizes and sprays the antibody solution on the surface of the reaction basement membrane 12, so that the antibody solution diffuses into the reaction basement membrane 12 to perform specific immunological binding reaction with the target mycotoxin in the sample solution, and colloidal precipitate is generated; after the reaction is finished, the base membrane is moved to the position below the elution dropping liquid unit 8, the elution dropping liquid unit 8 controls the eluent to drop the eluent to the reaction base membrane 12 at a constant dropping speed, and the free antibodies which do not participate in the specific immune binding reaction in the reaction base membrane 12 are eluted; the eluted waste liquid enters a waste liquid groove 6 at the bottom under the action of gravity for storage; the reaction basement membrane 12 after the elution is completed is moved to the lower part of the radioactivity detection device, radioactive rays emitted by colloidal precipitates in the reaction basement membrane 12 excite a fluorescent sheet in the radioactivity detection unit 7 to emit visible light, and the visible light is focused and enhanced by a visible light focusing sheet and then is projected onto a photoelectric sensor to be converted into an electric signal, so that the radioactivity of the colloidal precipitates in the reaction basement membrane 12 is quantitatively detected.

In the embodiment, by arranging a plurality of groups of combined feeding units 9, elution dropping units 8 and radioactivity detection units 7, synchronous and rapid detection of various different types of mycotoxins existing in a sample solution can be realized; the generated colloidal precipitate with radioactivity is utilized to excite the fluorescent sheet to emit light, the visible light is detected, the radioactivity intensity of the colloidal precipitate is quantitatively obtained, the detection sensitivity is high, the detection speed is high, and the requirement for high-sensitivity synchronous rapid detection of different types of mycotoxins in the sample solution can be met.

As shown in fig. 1 to 9, the method for simultaneously detecting a plurality of mycotoxins in a sample solution by using any one of the above highly sensitive multi-mycotoxin detection robots includes the steps of:

step S1: adding a sample solution to be tested into a sample solution tank 33, and fixedly installing the reaction base membrane 12 at the front end of the sliding block 13;

in the step, the sample liquid to be tested needs to be filtered, so that the blockage of the liquid adding device 3 caused by solid impurities in the sample liquid is avoided; the reaction base film 12 is stably and smoothly installed, so that the influence on the detection result caused by the warping and wrinkling of the reaction base film 12 is avoided;

step S2: the displacement driving device 2 drives the slide block 13 to drive the reaction base film 12 to move to the lower part of the combined feeding unit 9, and the liquid adding device 3 pumps a sample liquid with a fixed volume to the combined feeding unit 9 and adds the sample liquid on the reaction base film 12 in a dropwise manner;

in the step, a plurality of sample liquid dripping points can be set for dispersing and dripping so as to accelerate the sample liquid diffusion and improve the detection efficiency;

step S3: after the sample solution is completely diffused, pumping excessive antibody solution to the combined feeding unit 9 through the liquid feeding device 3 and dropwise adding the excessive antibody solution on the reaction base membrane 12;

in the step, a plurality of antibody liquid dripping points can be set for dispersing and dripping so as to accelerate sample liquid diffusion and improve detection efficiency; the addition amount of the antibody liquid drop is excessive, and is preferably 1.5-2 times of the volume of the sample liquid;

step S4: after the dropwise addition is finished, waiting for the sample solution and the antibody solution to fully generate specific immunological binding reaction and generating a colloidal precipitate;

in the step, preferably, the standing reaction time is preferably 5-8min at the reaction temperature of 25 ℃, and can be adjusted according to the reaction temperature;

step S5: after the immune combination reaction is finished, the displacement driving device 2 drives the sliding block 13 to drive the reaction base membrane 12 to move to the lower part of the elution dropping liquid unit 8, and the elution dropping liquid unit 8 is used for eluting the antibody liquid which does not participate in the reaction on the reaction base membrane 12;

in the step, the preferred flushing liquid is deionized water, the elution flow is 30mL/min, the colloidal precipitate in the reaction base membrane 12 is prevented from being damaged by overlarge flow in the elution process, the elution time is 2-3min, and the influence of partial dissolution of the colloidal precipitate on the detection result due to overlong elution time is avoided;

step S6: after the elution is finished, the displacement driving device 2 drives the slide block 13 to drive the reaction base membrane 12 to move to the lower part of the radioactivity detection unit 7, and the radioactivity intensity of the reaction base membrane 12 is detected;

in this step, the distance between the detection head of the radioactivity detection unit 7 and the reaction base film 12 is preferably 15-20mm, and the difference of the distance between the detection head of each radioactivity detection unit 7 and each reaction base film 12 during synchronous detection is less than 2 mm;

step S7: and calculating the concentration of the target mycotoxin in the sample solution to be tested according to the radioactivity value of the colloidal precipitate in the reaction basement membrane 12.

In this step, assuming that the binding ratio coefficient between the target mycotoxin and the antibody is K, the molar mass of the target mycotoxin is M, the molar mass of the antibody is M, the radioactivity intensity of the antibody per unit amount of substance is C, the volume of the sample solution to be added is V, the measured radioactivity of the colloidal precipitate is C, and the concentration of the target mycotoxin in the sample solution with radioactivity intensity is S, the method for calculating the concentration of the target mycotoxin in the sample solution to be tested from the measured radioactivity value is as follows: and S is C/cKV.

The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present patent application are included in the protection scope of the present patent application.