Fruit and vegetable multi-pesticide residue rapid detecting method

Abstract

The invention discloses a fruit and vegetable multi-pesticide residue rapid detecting method. The fruit and vegetable multi-pesticide residue rapid detecting method comprises following steps: a 15+-0.5g pre-treated sample is weighed, and is delivered into a reagent bottle, 90ml of ethyl acetate is added, an obtained mixture is mixed to be uniform via shaking, sodium bicarbonate and anhydrous sodium sulfate are added, and an obtain mixed material is mixed to be uniform via shaking; the reagent bottle is subjected to water batch at 30+-3 DEG C, and is subjected to homogenizing for 1min in a homogenizer; an upper layer clear liquid in the reagent bottle is filtered, and a filtrate is collected; two parts of the filtrate are delivered into two pear-shaped bottles respectively, and are both subjected to water bath at 35+-3 DEG C; one part of filtrate is subjected to vacuum concentration to dry so as to obtain a residue, and the other part of filtrate is subjected to vacuum concentration toclose to dry. The fruit and vegetable multi-pesticide residue rapid detecting method can be used for detection of most fruit and vegetable based samples; a pre-treatment step is adopted, pesticide objects of different properties are detected using a gas phase liquid phase tandom mass spectrometer, the using amount of chemical reagents in the pre-treatment process is reduced, pre-treatment time isshortened, detection analysis efficiency is increased, and accurate and reliable analysis results are obtained at the same time.

Description

technical field [0001] The invention relates to the technical field of trace chemical substance detection, in particular to a rapid detection method for many pesticide residues in fruits and vegetables. Background technique [0002] Pesticide residues are one of the important indicators of the quality and safety of agricultural products. All countries in the world, especially developed countries, attach great importance to the problem of pesticide residues, and have stipulated increasingly strict limit standards for pesticide residues in various agricultural by-products. Export enterprises need to pay more attention to the changes in the management measures of pesticides and pesticide residue limit standards in various countries. In China, the national standard GB2763 "Maximum Residue Limits of Pesticides in Food" was enforced on October 1, 2005. So far, 4140 residue limits of 433 pesticides in 13 categories of agricultural products have been stipulated. At the same time,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a rapid detection method for multi-pesticide residues in fruits and vegetables, aiming to solve the problems of narrow application range, harsh sample requirements and low detection efficiency of current rapid detection methods for multi-pesticide residues in fruits and vegetables