Analyzing method for simultaneously determining residues of organophosphorus pesticides and pyrethriods pesticides in soil

A technology of pyrethroids and pyrethroids, which is applied in the field of simultaneous determination of organophosphorus and pyrethroid pesticide residues in soil, can solve the problem of insufficient stability and reliability of detection results, long detection methods, cumbersome operations, etc. question

Active Publication Date: 2014-07-09
江苏太湖地区农业科学研究所
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[0004] The present invention provides an analytical method for simultaneously measuring the residues of organophosphorus and py

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  • Analyzing method for simultaneously determining residues of organophosphorus pesticides and pyrethriods pesticides in soil
  • Analyzing method for simultaneously determining residues of organophosphorus pesticides and pyrethriods pesticides in soil
  • Analyzing method for simultaneously determining residues of organophosphorus pesticides and pyrethriods pesticides in soil

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Embodiment

[0043] Example: An Analytical Method for the Simultaneous Determination of Organophosphorus and Pyrethroid Pesticide Residues in Soil

[0044] The soil for testing is yellow loam, collected from tea gardens in Dongshan District, Suzhou, and the sampling depth is 0-15cm. Remove grass roots, stones and other sundries from the soil sample, mash it manually, mix thoroughly in a pot or other suitable container, and take a certain amount by quartering method for later use. The prepared soil sample should be analyzed as soon as possible, otherwise put it in -20 Stored in a refrigerator at ℃, the basic physical and chemical properties of the soil are: pH 4.1-4.7, clay content 14%-17%, organic matter content 23.41-59.83g / kg. The analytical method consists of two parts:

[0045] In the first part, the standard curves of the measured organophosphorus pesticides and pyrethroid pesticides of known gradient concentrations are respectively established by gas chromatography; the establishmen...

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Abstract

The invention provides an analyzing method for simultaneously determining residues of organophosphorus pesticides and pyrethriods pesticides in soil. The analyzing method is characterized by comprising the following steps: carrying out ultrasonic extraction on a soil test sample by using an acetonitrile solution containing 1% of acetic acid by volume percent; purifying by using a suitable amount of PSA and C18 mixed fillers; blowing liquid supernatant by nitrogen and concentrating until the liquid supernatant is nearly dried; respectively dissolving by acetone and n-hexane and enabling the volume to be constant; raising the temperature by using DB-1701 and HP-5 quartz capillary columns and separating; carrying out GC/FPD (Gas Chromatograph/Flame Photometric Detector) detection and GC/micro ECD (Electron Capture Detector) detection; and finally, quantifying by using a base material external standard method. A test confirms that the method has a wide linear range; the technical indexes including detection sensitivity, accuracy and precision meet the requirements of a residue analysis; the pre-treatment operation is simple, convenient and rapid and a reliable manner is provided for analytical researches for simultaneously determining the residues of ths pesticides and the pyrethriods pesticides in the soil.e organophosphoru.

Description

technical field [0001] The invention relates to the field of detection methods for pesticide residues, in particular to an analysis method for simultaneously measuring organic phosphorus and pyrethroid pesticide residues in soil. The analysis method is to extract and purify the soil by using the improved QuEChERS method. The organophosphorus and pyrethroid pesticides are detected by gas chromatography to achieve the purpose of fast, simple and reliable. Background technique [0002] Organophosphorus pesticides (English name: Organophosphorus pesticides) and pyrethroid pesticides (English name: Pyrethroid pesticides) are currently two types of pesticides widely used in various regions of my country, with the characteristics of broad spectrum, high efficiency, economy, many varieties, and less dosage. , has played an important role in preventing and controlling diseases, insect pests and weeds, and ensuring crop yield. However, studies have confirmed that these two types of pe...

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
Inventor 刘腾飞杨代凤董明辉谢修庆张丽邓金花蒋宝南顾俊荣陆皓茜李军钱辉
Owner 江苏太湖地区农业科学研究所
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