QuEChERS提取与气相色谱-电子捕获检测器串联测定茶叶中12种农药残留  

Residue Analysis of 12 Pesticides in Tea by GC-ETD after QuEChERS Clean-up

作　　者：张放[1] 雷霁卿 杨霏[3] 

机构地区：[1]贵阳职业技术学院,贵州贵阳550081 [2]贵阳学院食品与制药工程学院,贵州贵阳550005 [3]贵州省计量测试院,贵州贵阳550003

出　　处：《化学试剂》2016年第1期47-51,共5页Chemical Reagents

基　　金：贵阳职业技术学院院级科研项目(GYZJY2015-YB-14);贵州省科学基金资助项目(黔科合J字[2014]2107号)

摘　　要：建立了Qu ECh ERS提取与气相色谱-电子捕获检测器串联测定茶叶中12种农药残留的方法。试样经一种Qu EChERS方法进行前处理,经GC-ECD检测,基质外标法定量。当农药的添加级别范围在0.05~0.5 mg/kg时,平均回收率为71.6%~109.0%,相对标准偏差(RSDs)为0.29%~11.21%;线性范围为0.05~1μg/m L,最低检出量(LODs)为0.5×10^(-12)~26.1×10^(-12)g,最低检出浓度(LOQs)为0.006~0.05 mg/kg。该方法的准确度、精密度和灵敏度均达到了农药残留检测的要求,可以检测随机在市场上买来的茶叶中多种农药残留情况。A method to determine 12 pesticide residues in tea using Qu ECh ERS and GC-ETD was developed. The samples were purified by a Qu ECh ERS method,followed by analysis by GC-ETD and quantified by the matrix matched external standard method. When pesticides were added range from 0. 05 0. 5 mg / kg,the average recovery rates were 71. 6% 109. 0%,RSDs0. 29% 11. 21%,linear range 0. 05 1 μg / m L,LODs 0. 5 × 10^- 12- 26. 1 × 10^- 12 g,and LOQs 0. 006 0. 05 mg / kg. This method can met the requirements of the residue analysis on accuracy and precision,and could be widely applied in random determination of pesticides residues in tea bought in the market.

关 键 词：茶叶 农药残留 QUECHERS 气相色谱 

分 类 号：O657.7[理学—分析化学]