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Quick detection method for pyrethroid pesticide residue

A technology for pyrethroids and pesticide residues, applied in chemical method analysis, measuring devices, and material analysis through observation of the impact on chemical indicators, can solve problems such as low cost, impossibility, and long detection cycle, and achieve Quick and easy effects

Inactive Publication Date: 2009-09-23
INSPECTION & QUARANTINE TECH CENT OF FUJIAN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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Problems solved by technology

These methods are not only cumbersome to operate, but also have a long detection period and a large consumption of reagents, and they cannot be fast, low-cost and easy to popularize and apply.

Method used

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  • Quick detection method for pyrethroid pesticide residue

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Embodiment Construction

[0007] The detection steps of the rapid detection method for pyrethroid pesticide residues of the present invention are as follows: (1) extract the detected object: grind the detected object containing pyrethroid pesticide residues and put it into the reactor after being weighed; (2) Decomposition and gas production reaction: first use a strong alkaline reagent to decompose the pyrethroid pesticide residues in the test object into cyanide-containing compounds, then add solid particles made of sodium borohydride and adsorption matrix to mix with the test object, and finally Add sulfuric acid solution into the reactor, and react with the solid particles to produce a large amount of gas instantly. (3) Color reaction: the decomposed gaseous components are introduced into the absorber and absorbed by the absorbing liquid in the absorber, the absorbing liquid is a composite agent composed of chloramine T isonicotinic acid and pyrazolone . The generated gas reacts with the specific ...

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Abstract

The invention relates to a rapid detection method for pyrethroid pesticide residues. The detection steps are as follows: (1) extracting the detected object: putting the detected object containing pyrethroid pesticide residues into a reactor; (2) decomposing, Gas production reaction: first use a strong alkaline reagent to decompose the pyrethroid pesticide residues in the test object into cyanide-containing compounds, then add solid particles made of sodium borohydride and adsorption matrix to mix with the test object, and finally add to the reaction Add sulfuric acid solution into the container, and react with the solid particles to produce a large amount of gas instantly. (3) Color reaction: The gas produced by decomposition is introduced into the absorber, and reacts with the specific color developer in the absorption liquid, turning the solution into blue. (4) Qualitative analysis: by comparing with the color chart made by the present invention, the pyrethroid pesticides in the sample can be qualitatively and semi-quantitatively analyzed. The detection method is not only easy to operate, fast and low in cost, but also beneficial to popularization and application.

Description

technical field [0001] The invention relates to a rapid detection method for pyrethroid pesticide residues. Background technique [0002] At present, pyrethroid pesticides are widely used in my country, and the food safety problems caused by their residues are increasingly attracting people's attention. The existing methods for the analysis of pyrethroid pesticide residues require complex pretreatment processes such as extraction and purification of samples, and then use large-scale instruments such as gas chromatography and gas chromatography-mass spectrometry for analysis. These methods are not only cumbersome to operate, but also have a long detection period and consume a lot of reagents, and they cannot be fast, low-cost and easy to popularize and apply. Contents of the invention [0003] The purpose of the present invention is to provide a rapid detection method for pyrethroid pesticide residues, which is not only simple and quick to operate, low in cost, but also co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/17G01N31/00
Inventor 蔡春平
Owner INSPECTION & QUARANTINE TECH CENT OF FUJIAN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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