A rapid detection device for pyrethroid pesticides

Abstract

The utility model discloses a quick detection device of pyrethrum pesticide, including detection device base, the upside of detection device base is covered with upper cover, and its inside is installed with test strip, the inside fixed connection of detection device base has the baffle seat, and the side wall of baffle seat is provided with the support station, still being provided with accommodating groove and the slot of detection device base, the bottom fixed setting of upper cover has the card seat. This quick detection device of pyrethrum pesticide, four groups of card seat are inserted in the inside of four groups of card slot respectively, the section of card slot and card seat all is swallowtail shape, the section of accommodating groove all is rectangle, completes the assembly use work of the detected device, and the inside detachable of detection device base can replace the work to test strip to the test strip, realizes the repeated use work of separation detection device base and upper cover, avoids the pollution environment, and reduces the cost of agricultural residue detection simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of pesticide residue detection, specifically a rapid detection device for pyrethroid pesticides. Background Technology

[0002] The detection of pyrethroid pesticides in plants using colloidal gold test strips is based on the principle of specific binding between antigens and antibodies. The specific detection steps are as follows: Take the edible part of the plant to be tested (such as cabbage leaves or cucumber flesh), remove any rotten or diseased parts, rinse thoroughly with deionized water, and dry. Weigh 2–5 g of homogeneous sample (accurate to 0.1 g), place it in a mortar or grinder, add 1–2 times the volume of extraction solution (e.g., 5 mL of extraction solution for 5 g sample), and grind into a homogenate (ensuring plant cells are broken down and pesticides are fully released). Note: Sampling must be uniform to avoid localized sample deviations that could lead to inaccurate results.

[0003] Shaking extraction: Transfer the homogenate to a centrifuge tube, rinse the mortar / grinder with a small amount of extract, pour the rinse solution into the centrifuge tube, tighten the cap, and place it in a vortex shaker for 1-2 minutes (or manually invert and shake for 30 seconds) to fully dissolve the pyrethroid pesticides into the extract.

[0004] Centrifugation purification: Place the centrifuge tube in a centrifuge and centrifuge at 3000-5000 rpm for 5-10 minutes. Take the clear upper layer of extract (i.e., "sample extract") and avoid aspirating the lower layer of precipitate (the precipitate is plant residue that may clog the test strip or interfere with the reaction).

[0005] Sample dilution: Take 100-200 μL of the upper sample extract and add it to the diluent provided with the test strip (the dilution ratio must be strictly in accordance with the test strip instructions, usually 1:5-1:10, such as 100 μL extract + 900 μL diluent), mix gently to obtain the "test solution", and let it stand for 1-2 minutes before use.

[0006] Place the rapid testing device (test strip) horizontally on a clean table. Use a pipette to draw 80-100 μL of the test solution (the volume should be in accordance with the instructions; too much may overflow, and too little may lead to incomplete reaction). Slowly add the solution to the sample well S of the test strip, ensuring that the liquid is evenly distributed along the sample well without generating air bubbles. Then, interpret the results. When in use, colloidal gold rapid detection devices consist of an outer plastic shell and an inner test strip. Both the test strip and the outer plastic shell are typically for single use. The outer plastic shell cannot be reused. The outer plastic shell of colloidal gold detection devices is mostly made of polypropylene (PP), polystyrene (PS), or polyethylene (PE). These general-purpose plastics have extremely long natural degradation cycles (usually decades to hundreds of years). Furthermore, due to the special nature of the detection scenarios (such as medical, agricultural product safety, and food testing), the plastic shell may be contaminated with sample residues (such as pesticides, biological fluids, and microorganisms), requiring disposal according to the "hazardous or special waste" regulations, further amplifying environmental risks. The inability to reuse the outer plastic shell also increases the cost of detecting pesticide residues. Utility Model Content

[0007] The purpose of this invention is to provide a rapid detection device for pyrethroid pesticides to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, a rapid detection device for pyrethroid pesticides is provided, comprising a detection device base, an upper cover covering the upper side of the detection device base, and a test strip installed inside the upper cover. A stop is fixedly connected inside the detection device base, and a support platform is provided on the side wall of the stop. The detection device base is also provided with a receiving groove and a slot. A slot is fixedly provided at the bottom of the upper cover, and a sample application port and a reaction zone are respectively provided on the surface of the upper cover.

[0009] Furthermore, the base of the detection device also includes a positioning groove, which is disposed on the upper surface of the support platform, and the height of the support platform is equal to the thickness of the test strip.

[0010] Furthermore, the positioning groove and the test strip are matched in size, and the test strip is inserted into the positioning groove, with the upper surface of the test strip flush with the upper surface of the stop.

[0011] Furthermore, the test strip is pressed together on the support platform by the upper cover, and the upper cover also includes a force-bearing plate, the surface of which is provided with multiple sets of serrated grooves at equal intervals.

[0012] Furthermore, two sets of card holders are provided on both sides of the bottom of the top cover, and the card holders are adapted to the size of the card slots, while the card holders are inserted inside the card slots.

[0013] Furthermore, a receiving groove is provided on one side of the card slot, and the receiving groove is connected to the card slot. The cross-sections of the card slot and the card seat are both dovetail-shaped, and the cross-section of the receiving groove is rectangular.

[0014] Furthermore, the base and top cover of the detection device are connected and installed via a locking seat and a slot, and the test strip inside the base of the detection device is a detachable structure.

[0015] Compared with the prior art, the beneficial effects of this utility model are: four sets of card holders are respectively inserted into the interior of four sets of card slots, the cross-section of the card slots and card holders are all dovetail-shaped, and the cross-section of the receiving groove is rectangular, thus completing the assembly and use of the detection device. The test strip is detachable inside the base of the detection device, and the test strip can be replaced by separating the base and the top cover of the detection device, realizing the reuse of the base and the top cover of the detection device, avoiding environmental pollution, and reducing the cost of pesticide residue detection. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of the structure of this utility model; Figure 2 This is a bottom view of the structure of this utility model; Figure 3 This is a cross-sectional view of the structure of this utility model; Figure 4 This is an assembly drawing of the structure of this utility model; Figure 5 The structure of this utility model Figure 4 A sectional view.

[0017] The following are the labels in the diagram: 1. Detection device base; 11. Stop; 12. Support platform; 13. Positioning groove; 14. Receiving groove; 15. Slot; 2. Top cover; 21. Sample dispensing port; 22. Reaction zone; 23. Force plate; 24. Slot; 3. Test strip. Detailed Implementation

[0018] Please see Figure 1-5 This utility model provides a rapid detection device for pyrethroid pesticides, including a detection device base 1, an upper cover 2 covering the upper side of the detection device base 1, and a test strip 3 installed inside the upper cover 2. A stop 11 is fixedly connected inside the detection device base 1, and a support platform 12 is provided on the side wall of the stop 11. The detection device base 1 is also provided with a receiving groove 14 and a slot 15. A slot 24 is fixedly provided at the bottom of the upper cover 2, and a sample application port 21 and a reaction zone 22 are respectively provided on the surface of the upper cover 2.

[0019] Working principle: When in use, after opening the base 1 and the top cover 2 of the detection device, place the test strip 3 on the positioning groove 13 on the surface of the support platform 12. At this time, the upper surface of the test strip 3 is flush with the upper surface of the stop 11. Hold the top cover 2 and insert the four sets of card holders 24 at the bottom of the top cover 2 into the inside of the receiving groove 14. Then move the top cover 2 so that the four sets of card holders 24 are respectively inserted into the inside of the four sets of card slots 15. The cross-section of the card slots 15 and the card holders 24 are all dovetail-shaped, and the cross-section of the receiving groove 14 is rectangular. This completes the assembly and use of the detection device. The test strip 3 is detachable inside the base 1 of the detection device. By separating the base 1 and the top cover 2 of the detection device, the test strip 3 can be replaced, realizing the reuse of the base 1 and the top cover 2 of the detection device, avoiding environmental pollution, and reducing the cost of pesticide residue detection.

[0020] In a preferred embodiment, the detection device base 1 also includes a positioning groove 13, and the positioning groove 13 is disposed on the upper surface of the support platform 12, the height of the support platform 12 being equal to the thickness of the test strip 3.

[0021] The positioning groove 13 and the test strip 3 are matched in size, and the test strip 3 is inserted into the positioning groove 13. The upper surface of the test strip 3 is flush with the upper surface of the stop 11.

[0022] The test strip 3 is pressed onto the support platform 12 by the upper cover 2, and the upper cover 2 also includes a force-bearing plate 23, the surface of which is provided with multiple sets of serrated grooves at equal intervals.

[0023] Two sets of card holders 24 are provided on both sides of the bottom of the top cover 2, and the card holders 24 are adapted to the size of the card slots 15, while the card holders 24 are inserted inside the card slots 15.

[0024] A receiving groove 14 is provided on one side of the card slot 15, and the receiving groove 14 is connected to the card slot 15. The cross-sections of the card slot 15 and the card seat 24 are both dovetail-shaped, and the cross-section of the receiving groove 14 is rectangular.

[0025] In a preferred embodiment, the detection device base 1 and the top cover 2 are connected and installed through a card holder 24 and a card slot 15, and the test strip 3 is a detachable structure inside the detection device base 1.

[0026] like Figure 1-5As shown: This solution reduces plastic waste pollution. Traditional devices require complete disposal, including the plastic casing. In contrast, this solution only requires separating the base 1 and top cover 2 after testing and replacing them with new test strips 3. The base 1 and top cover 2 are reusable, avoiding the massive white pollution caused by single-use plastic casings. It also eliminates the need for frequent purchases of complete plastic casings, reducing solid waste emissions during the testing process. Furthermore, it significantly reduces the cost of pesticide residue testing. For testing institutions, the base 1 and top cover 2 do not need to be replaced along with the test strips 3. Only the core consumable test strips 3 need to be replenished periodically, saving the cost of repeated purchases of plastic casings. This solution is particularly suitable for high-frequency pesticide residue testing scenarios, such as farmers' markets and grassroots agricultural technology stations. The slot 15 and the seat 24 adopt a dovetail cross-section design, which is less prone to deformation and wear during insertion and removal compared to ordinary buckles. This ensures that the base 1 and the top cover 2 remain structurally stable after multiple separations and reassemblies, further extending the reuse cycle and reducing component wear. The positioning groove 13 on the surface of the support platform 12 and the stop 11 provide a stable placement benchmark for the test strip 3, directly improving the reliability of the test and avoiding detection errors caused by the deviation of the test strip 3. When the test strip 3 is placed in the positioning groove 13, the contour of the positioning groove 13 can limit the lateral and longitudinal displacement of the test strip 3. At the same time, the design that the upper surface of the test strip 3 is flush with the upper surface of the stop 11 ensures that the test strip 3 is in a horizontal state. If the test strip 3 is tilted or deviated, it may cause uneven penetration of the test liquid. This design avoids this problem through physical positioning, ensuring the stability of the sample addition and reaction process. All test strips 3 are placed according to the positioning groove 13 and the stop 11, which can ensure that the sample application hole and reaction position of the test strip 3 are aligned with the sample application port 21 and reaction area 22 of the top cover 2 in different test batches. This avoids problems such as the observation window not being able to clearly see the strips and the misalignment of the sample application hole and the sample application area of ​​the test strip 3 due to the positional deviation of the test strip 3, thus improving the consistency of result interpretation. When holding the top cover 2, first insert the four sets of card slots 24 at the bottom into the receiving groove 14. The receiving groove 14 has a rectangular cross section and has a guiding and positioning function. Even non-professionals can quickly align it. Then move the top cover 2 to slide the card slots 24 into the card slots 15. The whole process does not require complicated operations such as screwing and locking. The assembly of the base 1 and the top cover 2 can be completed in a few seconds, which is suitable for the needs of rapid screening of pesticide residues on site. When it is necessary to replace the test strip 3, simply separate the base 1 and the top cover 2, take out the old test strip 3 directly from the positioning slot 13 of the support platform 12, and put in the new test strip 3. There is no need to damage the structure of the base 1 or the top cover 2, and the parts will not be damaged due to disassembly. This avoids the waste problem of having to discard the whole device if the shell is damaged in the traditional test strip and plastic shell binding design, and improves the detection efficiency. The dovetail-shaped slot 15, when combined with the card holder 24, provides a two-way anti-detachment effect. Even if the device is slightly moved during the test, the base 1 and the top cover 2 will not loosen. At the same time, the stable assembly ensures that the test strip 3 fits tightly against the inner wall of the device, preventing the test liquid from leaking from the gaps and preventing external dust and impurities from entering the device and contaminating the test strip 3. The rectangular cross-section design of the receiving groove 14 can buffer the impact force when the card holder 24 is inserted, preventing the card holder 24 or the slot 15 from breaking due to excessive force. The positioning groove 13's wrapping and limiting of the test strip 3 can also prevent the test strip 3 from being broken during replacement, reducing the waste of consumables caused by operational errors.

Claims

1. A rapid detection device for pyrethroid pesticides, comprising a detection device base (1), characterized in that: The upper side of the detection device base (1) is covered with a cover (2), and a test strip (3) is installed inside it. A stop (11) is fixedly connected inside the detection device base (1), and a support platform (12) is provided on the side wall of the stop (11). At the same time, a receiving groove (14) and a card slot (15) are also provided on the detection device base (1). A card seat (24) is fixedly provided at the bottom of the cover (2), and a sample application port (21) and a reaction zone (22) are respectively provided on the surface of the cover (2).

2. The rapid detection device for pyrethroid pesticides according to claim 1, characterized in that: The detection device base (1) also includes a positioning groove (13), and the positioning groove (13) is set on the upper surface of the support platform (12), the height of the support platform (12) being equal to the thickness of the test strip (3).

3. The rapid detection device for pyrethroid pesticides according to claim 2, characterized in that: The positioning groove (13) and the test strip (3) are matched in size, and the test strip (3) is inserted into the positioning groove (13). The upper surface of the test strip (3) is flush with the upper surface of the stop (11).

4. The rapid detection device for pyrethroid pesticides according to claim 3, characterized in that: The test strip (3) is pressed on the support platform (12) by the upper cover (2), and the upper cover (2) also includes a force-bearing plate (23), and the surface of the force-bearing plate (23) is provided with a plurality of serrated grooves at equal intervals.

5. The rapid detection device for pyrethroid pesticides according to claim 4, characterized in that: The bottom sides of the top cover (2) are provided with two sets of card seats (24), and the card seats (24) are adapted to the size of the card slot (15), while the card seats (24) are inserted into the inside of the card slot (15).

6. The rapid detection device for pyrethroid pesticides according to claim 5, characterized in that: The card slot (15) has a receiving groove (14) on one side, and the receiving groove (14) is connected to the card slot (15). The cross-sections of the card slot (15) and the card seat (24) are both dovetail-shaped, and the cross-section of the receiving groove (14) is rectangular.

7. The rapid detection device for pyrethroid pesticides according to claim 1, characterized in that: The detection device base (1) and the top cover (2) are connected and installed through a card seat (24) and a card slot (15), and the test strip (3) is a detachable structure inside the detection device base (1).

Images