Pretreatment for Pesticide Residue Detection – QuEChERS

Today, Hawach want to talk about the pre-treatment process for pesticide residue detection from the perspective of food safety – QuEChERS, and also tell you how to pre-treat pesticide residue food.

Introduction

The present analytical methods and determining techniques, pre-treatment processes of samples, and the rapid and easy determination of pesticides remaining in food were hot spots in the field of international agricultural products and food safety. The food safety inspection and supervision institutions have specialized chemical laboratory staff sampling the ingredients on the market every day, to check whether pesticide residues are up to standard.

Principle

Impurities can be removed and purified by means of the interaction between the adsorbent filler and the impurities in the matrix. The principle is similar to HPLC an d SPE. Specifically, the sample to be tested is homogenized and acetonitrile extraction and salt extraction is stratified with the help of specific salts. The impurities are combined with adsorbents for centrifugal separation and purification finally.

Operating steps

Pesticide residue detection in food is a process of quantitative analysis of the components in the complex matrix, including sample preparation, purification and enrichment, separation and detection, and comprehensive analysis. Pretreatment includes extraction and purification. Extraction is the process of dissolving and separating pesticide samples. Purification is an adsorption process of adsorbent and impurities to separate impurities and matrix.