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Quantitative detection method of pyrethroid pesticides in a kind of soil

A technology of pyrethroids and quantitative detection method, which is applied in the field of detection of pesticide residues, can solve the problems of insufficient stability and reliability of detection results, excessive consumption of organic solvents, cumbersome operations, etc., and achieve improved analysis accuracy, stable results, and repeatability good sex effect

Active Publication Date: 2015-11-25
江苏太湖地区农业科学研究所
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Problems solved by technology

[0004] The invention provides a quantitative detection method for pyrethroid pesticides in soil, the purpose of which is to solve the problem of long time-consuming, cumbersome operation, high consumption of organic solvents and insufficient stability of detection results of existing detection methods for pyrethroid pesticides in soil Reliability and other issues

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  • Quantitative detection method of pyrethroid pesticides in a kind of soil
  • Quantitative detection method of pyrethroid pesticides in a kind of soil
  • Quantitative detection method of pyrethroid pesticides in a kind of soil

Examples

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Embodiment

[0039] Example: A Quantitative Detection Method for Pyrethroid Pesticides in Soil

[0040] 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 quantitative detection method consists of two parts:

[0041] The first part is to establish the standard curve of the measured pyrethroid pesticides with known gradient concentration by gas chromatography; the establishment of the standard curve consists of the following steps:

[0042] The first step is to p...

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Abstract

The invention discloses a quantitative detection method for pyrethriods pesticide in soil. The method is characterized by comprising the following steps: carrying out ultrasonic extraction on a soil sample by using an acetonitrile solution of which the volume fraction is 1%, purifying by using proper mixed filler of PSA and C18; carrying out nitrogen blowing and concentrating on supernate until nearly dry; dissolving and metering volume by using normal hexane; heating up and separating by using HP-5 quartz capillary column program; carrying out GC / muECD detection; finally quantifying by using a matrix external standard method. A test proves that the method is wide in linear range, the technical indicators such as the detection sensitivity, the accuracy and the precision meet the requirements of residue analysis, the quantitative detection method is simple in pre-treatment operation, convenient and fast, and reliable means is provided for analysis and research of pyrethriods pesticide residue in the soil.

Description

technical field [0001] The invention relates to the field of detection methods for pesticide residues, in particular to a quantitative detection method for pyrethroid pesticides in soil. The quantitative detection method is to use the improved QuEChERS method to extract and purify the soil, and then use gas chromatography to detect The detection of pyrethroid pesticides is fast, simple and reliable. Background technique [0002] Pyrethroid pesticides (Pyrethroid pesticides) are a class of biomimetic synthetic insecticides that target nerve sodium ion channels. It should be widely used in the prevention and control of various crop pests such as fruits, vegetables, and rice. However, studies have confirmed that such pesticides can have toxic effects on the nervous system of the human body. Some varieties have carcinogenic, teratogenic, mutagenic effects and certain accumulation properties. Excessive use may accumulate in the human body, resulting in chronic accumulation poiso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88G01N30/14
Inventor 杨代凤刘腾飞董明辉陆皓茜张丽顾俊荣邓金花谢修庆蒋宝南
Owner 江苏太湖地区农业科学研究所
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