Residue Analysis of Thiamethoxam,Chlorfenapyr and Lambda-cyhalothrin in Tea and Soil by GC/ECD after QuEChERS Clean-up

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Residue Analysis of Thiamethoxam,Chlorfenapyr and Lambda-cyhalothrin in Tea and Soil by GC/ECD after QuEChERS Clean-up

- Residue Analysis of Thiamethoxam,Chlorfenapyr and Lambda-cyhalothrin in Tea and Soil by GC/ECD after QuEChERS Clean-up
- Vol. 32, Issue 4, Pages: 393-400(2013)
- 作者机构：
  
  1. 福建农林大学园艺学院
  2. 中国农业科学院茶叶研究所
- 作者简介：
- 基金信息：
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Residue Analysis of Thiamethoxam,Chlorfenapyr and Lambda-cyhalothrin in Tea and Soil by GC/ECD after QuEChERS Clean-up. [J]. 32(4):393-400(2013)
DOI：

Residue Analysis of Thiamethoxam,Chlorfenapyr and Lambda-cyhalothrin in Tea and Soil by GC/ECD after QuEChERS Clean-up. [J]. 32(4):393-400(2013) DOI：

摘要

采用QuEChERS方法净化，建立了GC/ECD法同时检测茶叶和土壤中噻虫嗪、虫螨腈和高效氯氟氰菊酯残留的分析方法。样品经水浸润后，乙腈提取，适量PSA、GCB和Florisil混合填料净化提取液，GC/ECD检测。噻虫嗪、虫螨腈和高效氯氟氰菊酯的响应分别在0.50~400、0.20~100、0.40~200 μg/L质量浓度范围内线性良好，相关系数r均大于0.99，检出限分别为0.25、0.05、0.10 μg/L。茶叶和土壤样品中，噻虫嗪、虫螨腈和高效氯氟氰菊酯的平均加标回收率为62%~108%，相对标准偏差（RSDs）不大于15.8%，方法的定量下限（LOQs）均不大于10 μg/kg。方法简便、快速，能够满足茶叶和土壤中上述3种不同极性农药残留同时检测的需要。采用该方法测定了3种农药在茶园茶叶和土壤中的残留量，结果满意。

Abstract

A GC/ECD method for the simultaneous analysis of thiamethoxam,chlorfenapyr and lambda-cyhalothrin residues in tea and soil was developed and validated.The samples were extracted with acetonitrile after water soaking,and purified by QuEChERS method using PSA,GCB and Florisil as adsorbents,then determined by GC/ECD.The result showed that the calibration curves were linear in the ranges of 0.50-400 μg/L for thiamethoxam,0.20-100 μg/L for chlorfenapyr and 0.40-200 μg/L for lambda-cyhalothrin,with correlation coefficients more than 0.99.The limits of detection（LODs） for thiamethoxam,chlorfenapy and lambda-cyhalothrin were 0.25,0.05,0.10 μg/L,respectively.The average recoveries in tea and soil at three spiked levels were between 62% and 108% with RSDs（n=5）no more than 15.8%,and the limits of quantitation（LOQs） were lower than 10 μg/kg.This method is easy,quick,effective and safe,and can meet the requirements for simultaneous residue determination of thiamethoxam,chlorfenapyr and lambda-cyhalothrin in tea and soil samples.

关键词

QuEChERSGC/ECD茶叶土壤噻虫嗪虫螨腈高效氯氟氰菊酯残留分析

Keywords

QuEChERSGC/ECDteasoilthiamethoxamchlorfenapyrlambda-cyhalothrinresidue analysis

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中国农业科学院果树研究所

农业部果品质量安全风险评估实验室（兴城）

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Shanxi Center for Testing of Functional Agro-products，Shanxi Agricultural University

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