An instrument for analyzing and detecting pesticide residues in agricultural products

Abstract

The present invention relates to an analytical detection instrument for pesticide residues in agricultural products, comprising: a test kit, wherein the box cavity of the test kit is divided into a generating chamber and a transparent absorbing chamber by a partition, a first electric control mechanism for controlling the switch state between the generating chamber and the absorbing chamber is provided on the top of the partition, and the generating chamber is connected to a sample chamber for loading a sample; a reagent chamber, wherein a second electric control mechanism for controlling the switch state is provided on the reagent chamber, and at least two reagent chambers for successively adding a first arsenic detection powder and an arsenic detection sheet to the generating chamber are provided in the generating chamber, and at least one reagent chamber for adding a second arsenic detection powder to the absorbing chamber is provided in the absorbing chamber. The present invention realizes on-site real-time detection by being integrated in a test kit, and by prefabricating reagent chambers and by electric control, thereby accelerating the detection speed and improving the detection accuracy.

Description

Technical Field

[0001] The invention belongs to the field of food safety, and in particular relates to an agricultural product pesticide residue analysis and detection instrument. Background Art

[0002] In response to the problem of excessive use of pesticides in the growth process of agricultural products, more and more food processing manufacturers have stricter requirements on pesticide residues in agricultural products, especially the content of harmful substances such as arsenic or arsenic hydrogen in agricultural products. The existing methods for detecting the content of arsenic in substances are:

[0003] The sample to be tested is dissolved in pure water in proportion to obtain a water sample to be tested. 20-100 ml of the water sample to be tested is placed in a generating bottle of an arsenic hydrogen generating device. 0.1-0.5 g of a first arsenic detection powder (the first arsenic detection powder is prepared by mixing potassium borohydride or sodium borohydride: sodium acetate: copper sulfate = (5-15): 2:1) and shaking to dissolve. 0.1-0.5 g of a second arsenic detection powder (the first arsenic detection powder is prepared by mixing silver sulfate: ammonium hydrogen sulfate: polyvinyl alcohol: sodium sulfate = (0.1-1): (2-10): (0.1-0 .5): (20~80) mixed, ground into powder to obtain the second arsenic detection powder) dissolved in 2~5ml of 40~60 degree ordinary white wine, poured into an absorption tube, add an arsenic detection piece (arsenic detection piece made of phosphoric acid: potassium dihydrogen phosphate = 1: (5~20), mixed, dried, and pressed into a tablet) into the arsenic hydrogen generating bottle, quickly connect the arsenic hydrogen generating bottle and the absorption tube with a connecting tube, react for 5~10 minutes, transfer the absorption liquid to the colorimetric cell, and measure with a colorimeter or spectrophotometer to obtain the arsenic content in the water sample to be tested, and thus the arsenic content in the substance.

[0004] However, the above detection process is a detection method under laboratory conditions and cannot meet the needs of on-site instant detection, resulting in a time-consuming and labor-intensive detection process. Summary of the invention

[0005] The purpose of the present invention is to provide an agricultural product pesticide residue analysis and detection instrument that can provide on-site rapid detection, and its technical scheme is as follows:

[0006] An analytical and detection instrument for pesticide residues in agricultural products, comprising:

[0007] A reagent box, wherein the box cavity of the reagent box is divided into a generating chamber and a transparent absorbing chamber by a partition, a first electric control mechanism for controlling the switch state between the generating chamber and the absorbing chamber is provided on the top of the partition, and the generating chamber is connected to a sample chamber for loading a sample;

[0008] A reagent chamber, wherein the reagent chamber is provided with a second electric control mechanism for controlling the switch state, the generating chamber is provided with at least two reagent chambers for sequentially adding the first arsenic detection powder and the arsenic detection sheet into the generating chamber, and the absorbing chamber is provided with at least one reagent chamber for adding the second arsenic detection powder into the absorbing chamber; and

[0009] A master control module is configured to enable the first electric control mechanism and the second electric control mechanism to respond after being triggered.

[0010] Preferably, it is defined that: the reagent compartment containing the first arsenic detection powder is the first reagent compartment, the reagent compartment containing the arsenic detection sheet is the second reagent compartment, and the reagent compartment containing the second arsenic detection powder is the third reagent compartment; and the second electric control mechanism provided on the first reagent compartment is the first sub-control mechanism, the second electric control mechanism provided on the second reagent compartment is the second sub-control mechanism, and the second electric control mechanism provided on the third reagent compartment is the third sub-control mechanism;

[0011] The master control module is also configured to control the first sub-control mechanism to respond to an action, then control the second sub-control mechanism and the third sub-control mechanism to respond to an action, and then control the first electronic control mechanism to respond to an action.

[0012] Preferably, the sample chamber is cylindrical, with its inner end extending into the generating chamber and its outer end open; an annular necking spring sheet and a diaphragm arranged close to one side of the generating chamber are provided on the chamber wall of the sample chamber.

[0013] Preferably, there are more than two necking spring pieces, the diaphragms correspond to the necking spring pieces one by one, and the diaphragms and the necking spring pieces are alternately distributed along the axial direction of the sample chamber.

[0014] Preferably, the analytical detection instrument further comprises:

[0015] A sample magazine, the sample magazine includes a first sleeve-shaped chamber body for interference-fitting in the sample chamber, the inner end of the first chamber body is sealed with a first sealing cap, the first sealing cap is connected to a first piston plate through a connecting rod extending axially along the first chamber body, the first sealing cap and the first piston plate are used to load samples, the outer side of the first piston plate is connected with a first magnetic part and a first spring, the other end of the first spring is pressed against a first spring seat plate, a through hole is opened on the first spring seat plate, a movable sleeve in the through hole is connected with a T-shaped first permanent magnet whose edge is stopped on the outer edge of the through hole, and the outer end of the first permanent magnet is stopped and connected with an electromagnetically controlled first door opening mechanism.

[0016] Preferably, the reagent chamber includes a second chamber body fixed on the box wall of the reagent kit, the inner end of the second chamber body is sealed with a second sealing cap, the second sealing cap is connected to a second piston plate through a connecting rod extending axially along the second chamber body, the second sealing cap and the second piston plate are used to fill reagents, the outer side of the second piston plate is connected with a second magnetic part and a second spring, the other end of the second spring is abutted against the second spring seat plate, the second spring seat plate is provided with a through hole, the movable sleeve in the through hole is connected with a T-shaped second permanent magnet whose edge is stopped on the outer edge of the through hole, and the outer end of the second permanent magnet is stopped and connected with an electromagnetically controlled second door opening mechanism.

[0017] Preferably, the first door opening mechanism and / or the second door opening mechanism includes a blocking door, there are two blocking doors and they are spliced ​​relative to each other, the relatively distant sides of the two blocking doors are hinged on the first warehouse body or the second warehouse body, one of the adjacent sides is provided with a fixing seat with a bolt hole, and the other is provided with an electromagnet with a push rod inserted in the bolt hole.

[0018] Preferably, the outer end of the first chamber body is provided with a flange that is turned outward and stops overlapping the edge of the outer port of the sample chamber.

[0019] Preferably, the first electric control mechanism comprises a connection port connected between the generating chamber and the absorbing chamber, and at least one side of the connection port is sealed with a bimetallic blocking piece which opens the connection port when heated.

[0020] Preferably, a sealing ring is provided on the connection port, which elastically seals with the blocking piece and extends along the edge of the connection port.

[0021] Beneficial effects of the present invention:

[0022] The present invention is integrated in a reagent box and realizes on-site real-time detection through a prefabricated reagent compartment and an electronic control method, thereby accelerating the detection speed and improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of an analysis and detection instrument in one embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram of a reagent compartment in an analytical detection instrument in one embodiment of the present invention;

[0025] Figure 3 is a schematic structural diagram of a sample chamber and a sample cartridge in an analysis and detection instrument in one embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of a sample chamber in an analytical detection instrument in one embodiment of the present invention;

[0027] Figure 5 yes Figure 1 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0028] See also Figures 1 to 5 , shows a schematic structural diagram of an analytical detection instrument in one embodiment of the present invention. The analytical detection instrument includes a reagent box 100, a reagent compartment 200 and a master control module. The box cavity of the reagent box 100 is divided into a generating compartment 110 and a transparent absorption compartment 120 by a partition 130. A first electric control mechanism for controlling the switch state between the generating compartment 110 and the absorption compartment 120 is provided on the top of the partition 130. The generating compartment 110 is connected to a sample compartment 140 for loading a sample. A second electric control mechanism for controlling the switch state is provided on the reagent compartment 200. At least two reagent compartments 200 for successively adding the first arsenic detection powder and the arsenic detection sheet into the generating compartment 110 are provided in the generating compartment 110. At least one reagent compartment 200 for adding the second arsenic detection powder into the absorption compartment 120 is provided in the absorption compartment 120. The master control module is configured to make the first electric control mechanism and the second electric control mechanism respond to the action after being triggered.

[0029] The master control module is connected to a master control switch, and pure water is pre-loaded in the generating chamber 110, and alcohol is pre-loaded in the absorbing chamber 120. After the user loads the sample from the sample chamber 140 into the generating chamber 110, the user turns on the master control switch, and the master control switch, through the second electric control mechanism, first puts in the first arsenic detection powder, and then puts in the arsenic detection sheet and the second arsenic detection powder at the same time, so that the reagent and the sample are fully mixed and reacted; then after a set time, the first electric control mechanism is controlled to operate, so that the generating chamber 110 and the absorbing chamber 120 are connected, so that the reaction gas in the generating chamber 110 is absorbed by the liquid in the absorbing chamber 120, so as to perform color comparison.

[0030] In some embodiments of the present invention, for the purpose of convenient installation and independent control, the reagent compartment 200 containing the first arsenic detection powder is the first reagent compartment 210, the reagent compartment 200 containing the arsenic detection sheet is the second reagent compartment 220, and the reagent compartment 200 containing the second arsenic detection powder is the third reagent compartment 230; and the second electric control mechanism provided on the first reagent compartment 210 is the first sub-control mechanism, the second electric control mechanism provided on the second reagent compartment 220 is the second sub-control mechanism, and the second electric control mechanism provided on the third reagent compartment 230 is the third sub-control mechanism. The master control module is also configured to control the first sub-control mechanism to respond to an action, then control the second sub-control mechanism and the third sub-control mechanism to respond to an action, and then control the first electric control mechanism to respond to an action.

[0031] In some embodiments of the present invention, in order to avoid looseness and leakage of pure water when loading the sample magazine, the sample magazine 140 is cylindrical, with its inner end extending into the generating magazine 110 and its outer end open; an annular shrinking spring piece 141 and a diaphragm 142 arranged on one side close to the generating magazine 110 are provided on the magazine wall of the sample magazine 140.

[0032] In some embodiments of the present invention, in order to further prevent leakage of pure water, there are more than two necking springs 141, the diaphragms 142 correspond to the necking springs 141 one by one, and the diaphragms 142 and the necking springs 141 are alternately distributed along the axial direction of the sample chamber 140.

[0033] In some embodiments of the present invention, the analysis and detection instrument also includes a sample magazine 300, which includes a sleeve-shaped first magazine body 310 for interference insertion in the sample magazine 140, the inner end of the first magazine body 310 is sealed with a first sealing cap 320, the first sealing cap 320 is connected to a first piston plate 340 through a connecting rod extending axially along the first magazine body 310, the first sealing cap 320 and the first piston plate 340 are used to load samples, the outer side of the first piston plate 340 is connected to a first magnetic member 350 and a first spring 360, the other end of the first spring 360 is pressed against a first spring seat plate 380, the first spring seat plate 380 is provided with a through hole, the movable sleeve in the through hole is connected to a T-shaped first permanent magnet 370 whose edge is stopped on the outer edge of the through hole, and the outer end of the first permanent magnet 370 is stopped and connected to an electromagnetically controlled first door opening mechanism. When in use, the first permanent magnet 370 is magnetically connected to the first magnetic part 350, and the first door opening mechanism is blocked outside the first permanent magnet 370. As the first door opening mechanism is actuated, the constraint on the first permanent magnet 370 is released, and under the pushing action of the first spring 360, the first permanent magnet 370 falls off, and the first spring seat plate 380 is blocked on the cover of the first chamber body 310, so that the first spring 360 pushes against the first piston plate 340, and the sample between the first sealing cap 320 and the first piston plate 340 is added into the pure water.

[0034] In some embodiments of the present invention, the reagent compartment 200 includes a second compartment body 210 fixed on the box wall of the reagent kit 100, the inner end of the second compartment body 210 is sealed with a second sealing cap 220, the second sealing cap 220 is connected to a second piston plate 240 through a connecting rod extending axially along the second compartment body 210, the second sealing cap 220 and the second piston plate 240 are used to fill reagents, the outer side of the second piston plate 240 is connected with a second magnetic member 250 and a second spring 260, the other end of the second spring 260 is abutted against a second spring seat plate 280, the second spring seat plate 280 is provided with a through hole, the movable sleeve in the through hole is connected with a T-shaped second permanent magnet 270 whose edge is stopped on the outer edge of the through hole, and the outer end of the second permanent magnet 270 is stopped and connected with an electromagnetically controlled second door opening mechanism.

[0035] In some embodiments of the present invention, the first door opening mechanism and the second door opening mechanism include a blocking door 410, wherein the blocking door 410 has two portions and is relatively connected to each other, and the relatively distant sides of the two blocking doors 410 are hinged to the first bin body 310 or the second bin body 210, and one of the adjacent sides is provided with a fixing seat 420 with a bolt hole, and the other is provided with an electromagnet 430 with a push rod inserted into the bolt hole.

[0036] In some embodiments of the present invention, the outer end of the first chamber body 310 is provided with a flange 330 that is turned outward and stops overlapping the edge of the outer port of the sample chamber 140 .

[0037] In some embodiments of the present invention, the first electric control mechanism includes a connection port connected between the generating chamber 110 and the absorbing chamber 120, and the two sides of the connection port are sealed with bimetallic baffles 510 that open the connection port when heated, and the two baffles 510 are respectively located on both sides of the connection port, and the tops of the baffles 510 are connected by an integrally formed arc-shaped bridge section to form a π shape. Preferably, an electric heating spacer 520 is provided between the two baffles 510, and a vent hole is opened on the electric heating spacer 520, and a wire 530 is connected to the top of the electric heating spacer 520.

[0038] In some other embodiments of the present invention, a sealing ring is provided on the connection port, which elastically seals with the blocking piece 510 and extends along the edge of the connection port.

[0039] In some embodiments of the present invention, the absorption chamber 120 and the generation chamber 110 are both separated by a PE waterproof and breathable membrane 600 located between the reagent chamber 200 and the first electric control mechanism.

[0040] In some embodiments of the present invention, an energy storage device 700 for supplying power to the master control module, the first electric control mechanism and the second electric control mechanism is provided at the bottom of the reagent box 100. Preferably, the energy storage device 700 is a storage battery.

Claims

1. An analytical instrument for detecting pesticide residues in agricultural products, comprising: A test kit, wherein the box cavity of the test kit is divided into a generating chamber and a transparent absorbing chamber by a partition, a first electric control mechanism for controlling the switch state between the generating chamber and the absorbing chamber is provided on the top of the partition, the generating chamber is connected to a sample chamber for loading a sample; the sample chamber is cylindrical, the inner end of which extends into the generating chamber and the outer end is open; an annular necking spring sheet and a diaphragm arranged close to one side of the generating chamber are provided on the chamber wall of the sample chamber; A sample magazine, the sample magazine comprising a sleeve-shaped first chamber body for interference-insertion in the sample chamber, a first sealing cap being sealedly sleeved at the inner end of the first chamber body, the first sealing cap being connected to a first piston plate via a connecting rod extending axially along the first chamber body, a sample being loaded between the first sealing cap and the first piston plate, a first magnetic member and a first spring being connected to the outer side of the first piston plate, the other end of the first spring being pressed against a first spring seat plate, a through hole being provided on the first spring seat plate, a T-shaped first permanent magnet having an edge stopped on the outer edge of the through hole being connected to a movable sleeve in the through hole, and a first electromagnetically controlled first door opening mechanism being stopped at the outer end of the first permanent magnet; A reagent chamber, wherein the reagent chamber is provided with a second electric control mechanism for controlling the switch state, the generating chamber is provided with at least two reagent chambers for sequentially adding the first arsenic detection powder and the arsenic detection sheet into the generating chamber, and the absorbing chamber is provided with at least one reagent chamber for adding the second arsenic detection powder into the absorbing chamber; as well as A master control module is configured to enable the first electric control mechanism and the second electric control mechanism to respond after being triggered.

2. The analytical detection instrument according to claim 1, wherein: Definition: the reagent compartment containing the first arsenic detection powder is the first reagent compartment, the reagent compartment containing the arsenic detection sheet is the second reagent compartment, and the reagent compartment containing the second arsenic detection powder is the third reagent compartment; and the second electric control mechanism provided on the first reagent compartment is the first sub-control mechanism, the second electric control mechanism provided on the second reagent compartment is the second sub-control mechanism, and the second electric control mechanism provided on the third reagent compartment is the third sub-control mechanism; The master control module is also configured to control the first sub-control mechanism to respond to an action, then control the second sub-control mechanism and the third sub-control mechanism to respond to an action, and then control the first electronic control mechanism to respond to an action.

3. The analytical detection instrument according to claim 1, wherein: There are more than two necking spring pieces, the diaphragms correspond to the necking spring pieces one by one, and the diaphragms and the necking spring pieces are alternately distributed along the axial direction of the sample chamber.

4. The analytical detection instrument according to claim 1, wherein: The reagent compartment includes a second compartment body fixed on the box wall of the reagent kit, the inner end of the second compartment body is sealed with a second sealing cap, the second sealing cap is connected to a second piston plate via a connecting rod extending axially along the second compartment body, the second sealing cap and the second piston plate are used to load reagents, the outer side of the second piston plate is connected with a second magnetic member and a second spring, the other end of the second spring is pressed against the second spring seat plate, a through hole is provided on the second spring seat plate, a T-shaped second permanent magnet whose edge is stopped on the outer edge of the through hole is connected to a movable sleeve in the through hole, and the outer end of the second permanent magnet is stopped and connected with an electromagnetically controlled second door opening mechanism.

5. The analytical detection instrument according to claim 4, wherein: The first door opening mechanism and / or the second door opening mechanism include a blocking door, which has two blocking doors and is relatively spliced ​​together. The relatively distant sides of the two blocking doors are hinged on the first warehouse body or the second warehouse body, and one of the adjacent sides is provided with a fixing seat with a bolt hole, and the other is provided with an electromagnet with a push rod inserted in the bolt hole.

6. The analytical detection instrument according to claim 1, wherein: The outer end of the first chamber body is provided with a flange which is turned outward and stops overlapping the edge of the outer port of the sample chamber.

7. The analytical detection instrument according to any one of claims 1 to 6, wherein: The first electric control mechanism comprises a connection port connected between the generating chamber and the absorbing chamber, and at least one side of the connection port is sealed with a bimetallic blocking piece which opens the connection port when heated.

8. The analytical detection instrument according to claim 7, wherein: The connection port is provided with a sealing ring which elastically seals with the blocking piece and extends along the edge of the connection port.

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