QuEChERS方法在茶叶农药残留检测中的应用研究进展

QuEChERS methodology and its application in pesticide residues determination in tea

茶叶的农药残留检测关系到茶叶的质量安全。茶叶样品基质复杂,干扰物质多,其样品前处理是农药残留检测过程中耗时最长、工作量最大的部分,并决定分析方法的准确度和精密度。QuEChERs(quick,easy,cheap,effective,rugged,safe)方法作为一种农药多残留分析的前处理方法,由于具有快速、简单、廉价、有效、可靠、安全的特点而成为近年来的研究热点。本文在简要介绍QuEChERS方法的基础上,综述了该方法在茶叶农药残留检测中的重要应用,详细评述了在取样量选择、样品预处理方法、提取剂选择及净化过程等方面对QuEChERS方法进行优化改进的研究进展。分析了QuEChERs方法在茶叶农药残留检测中存在的问题和不足,展望了该方法在茶叶农药残留检测中的发展方向,以期为QuEChERs方法在茶叶农药残留检测中的完善和发展提供参考。

The determination of pesticides residues in tea is a critical problem as the quality and safety of tea has become a hot topic.Sample preparation procedures are time-consuming and labor-intensive because of the small quantities of analytes and large amounts of interfering substances in tea which can be co-extracted with analytes and,in most cases,adversely affect the results of an analysis.Additionally,the accuracy and precision of analytical methods mostly depend on the quality of sample preparation procedures.QuEChERS methodology,which stands for 'quick,easy,cheap,effective,rugged and safe',is a streamlined and effective extraction and cleanup approach for the analysis of diverse pesticides residues in food matrices,and has received much concern since its inception.This review mainly introduces QuEChERS methodology and its application in pesticide residues analysis in tea.The optimization processes including sampling,sample preparation,extraction and purification of QuEChERS methodology were reviewed.Furthermore,limitations as well as possible research tendency of QuEChERS methodology have been discussed to provide certain reference for the development and improvement of its application in pesticide residues analysis in tea.