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Pesticide Residue Detection Method Based on Spot Geometric Quantity Measurement

A pesticide residue detection and pesticide residue technology, which is applied in the field of pesticide detection and food safety, can solve the problems of inability to measure and correct, and achieve the effect of increasing the scope of application, improving reliability, and simple operation process

Active Publication Date: 2019-01-11
NANCHANG ZHENGWEI TRADE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In these two patents, a movable transparent adjustment plate is provided inside the liquid storage chamber to prevent the parallel light emitted from the liquid storage chamber from hitting the two pinholes of the pinhole array plate under a specific refractive index condition. However, since the transparent adjustment plate has only two moving positions, there will be a very small probability that after moving the transparent adjustment plate, the parallel light emitted from the liquid storage chamber will irradiate between the other two pinholes. time, also cannot be measured and cannot be corrected by the operator

Method used

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  • Pesticide Residue Detection Method Based on Spot Geometric Quantity Measurement
  • Pesticide Residue Detection Method Based on Spot Geometric Quantity Measurement

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specific Embodiment 1

[0050] This embodiment is an embodiment of a pesticide residue detection device based on spot geometric quantity measurement.

[0051] The structure diagram of the pesticide residue detection device based on spot geometric quantity measurement in this embodiment is as follows figure 1 As shown, the detection device is placed in a dark box with black flannelette on the inner surface in order to place a liquid storage chamber 1, a pinhole array plate 2, a Fourier lens 3, an image sensor 4, a computer 5 and a displacement driver 6;

[0052] The liquid storage bin 1 is placed obliquely with respect to the optical axis. The outer side of the liquid storage bin 1 is provided with a circular hole projected to a plane perpendicular to the optical axis. Medium irradiation, the liquid storage bin 1 is equipped with pesticide residue extracting solution;

[0053] The pinhole array plate 2 is fixedly placed perpendicular to the direction of the optical axis, and the pinhole array plate 2...

specific Embodiment 2

[0059] This embodiment is an embodiment of a pesticide residue detection device based on spot geometric quantity measurement.

[0060] The pesticide residue detection device based on spot geometric quantity measurement in this embodiment, on the basis of the specific embodiment 1, further defines that the displacement driver 6 includes a first clamping end 61 and a second clamping end arranged on both sides of the pinhole array plate 2 The holding end 62; the section of the first holding end 61 is "I" shape, and the "I" shape faces the gap of the pinhole array plate 2 and fixes the pinhole array plate 2 with screws, and faces away from the pinhole array plate 2 is provided with a roller 63 on the same plane as the pinhole array plate 2; the second clamping end 62 is provided with a gap facing the direction of the pinhole array plate 2, and the pinhole array plate 2 is fixed by screws, facing away from the pinhole array plate 2. The direction of the pinhole array plate 2 is pro...

specific Embodiment 3

[0062] This embodiment is an embodiment of a method for detecting pesticide residues based on spot geometric quantity measurement.

[0063] The pesticide residue detection method based on spot geometric quantity measurement in this embodiment is realized on the pesticide residue detection device based on spot geometric quantity measurement described in the specific embodiment 1. The pesticide residue detection method based on spot geometric quantity measurement includes the following steps :

[0064] Step a, extracting the pesticide residue with a transparent solvent to form a solution with the pesticide as the solute and the transparent solvent as the solvent;

[0065] It should be noted in this step that this application only detects pesticides with the following characteristics: pesticides that can be dissolved in transparent solvents and dissolved by transparent solvents; pesticides whose concentration changes will change the refractive index of the solution; in this step,...

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Abstract

The invention discloses a pesticide residue detecting method based on light spot geometric quantity measurement, and belongs to the technical field of pesticide detection. The method sequentially includes the steps of preparing a solution, pouring the solution into a solution storage bin, conducting irradiation through parallel light so as to ensure that one needle hole is lit up, making the center of the parallel light coincide with the needle hole on the basis that the needle hole is lit up, obtaining the size or / and position of a light spot, judging the coordinates of the lit-up needle hole, judging the transverse displacement of emergent parallel light of the solution storage bin relative to incident parallel light, obtaining the refractive index of the solution and finally obtaining the pesticide residue amount. The characteristic that the refractive index of the solution can be changed when the concentration of a pesticide solution is different is found, and a brand-new pesticide residue detection technological means is provided.

Description

technical field [0001] The invention discloses a method for detecting pesticide residues based on light spot geometric quantity measurement and belongs to the technical fields of food safety and pesticide detection. Background technique [0002] The development of agricultural industrialization has made the production of agricultural products more and more dependent on exogenous substances such as pesticides. The amount of pesticides used in agricultural products in my country remains high, and the unreasonable use of these substances will inevitably lead to excessive pesticide residues in agricultural products, affecting the safety of consumers, and in severe cases, it will cause consumers to become ill, develop abnormally, and even directly lead to poisoning die. Excessive pesticide residues will also affect the trade of agricultural products, making China's agricultural exports face severe challenges. The control of pesticide residues is of great significance to both foo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/41
CPCG01N21/41
Inventor 王琪
Owner NANCHANG ZHENGWEI TRADE CO LTD