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当前位置: 首页 > 文章 > GC-ECD检测苦荞茶中的31种农药残留不同前处理方法比较 云南农业大学学报(自然科学) 2017 (3) 536-542
Position: Home > Articles > Comparison of Four Different Sample Treatment Methods in the Analysis of 31 Pesticide Residues in Buckwheat Tea By Gas Chromatography-electron Capture Detector Journal of Yunnan Agricultural University(Natural Science) 2017 (3) 536-542

GC-ECD检测苦荞茶中的31种农药残留不同前处理方法比较

作  者：
邱世婷;侯雪;杨晓凤;韩梅;赵郭艳
单  位：
四川省农业科学院分析测试中心;成都医学院;农业部农产品质量安全风险评估实验室(成都)
关键词：
苦荞茶;固相小柱萃取;凝胶渗透法;分散固相萃取;GC-ECD;农药残留
摘  要：
【目的】以气相色谱—电子捕获检测器(GC-ECD)技术为基础,建立了适合苦荞茶中31种农药残留分析的4种前处理方法:SPE(florisil柱)法、SPE(NH_2-Carb柱)法、GPC法、d-SPE(PSA+C18)法。【方法】以苦荞茶中的有机氯和拟除虫菊酯类等共31种农药为研究对象,从空白基质净化效果、基质效应、不同浓度添加回收率方面对4种前处理方式进行对比分析。【结果】SPE(florisil柱)法得到的空白基质干扰最少,基质效应最弱,稳定性最好,能保证大部分目标物的回收率在70%~120%,但对氟虫腈及代谢物回收率较差;SPE(NH_2-Carb柱)法能保证氟虫腈及其代谢物和大部分目标化合物的回收率,适合于多农药残留分析检测,但对环境不友好;GPC法稳定性略差;d-SPE(PSA+C18)法方法简便快捷,但回收率偏高,应配合内标法或对分散固相萃取剂用量进一步优化后使用。【结论】本研究可为苦荞茶中31种农药残留测定方法的选择提供数据支持。
译  名：
Comparison of Four Different Sample Treatment Methods in the Analysis of 31 Pesticide Residues in Buckwheat Tea By Gas Chromatography-electron Capture Detector
作  者：
QIU Shiting;HOU Xue;YANG Xiaofeng;HAN Mei;ZHAO Guoyan;Analytical and Testing Centre,Sichuan Academy of Agricultural Sciences;Laboratory of Risk Assessment for Agricultural Product (Chengdu) ,Ministry of Agriculture;Chengdu Medical Colledge;
关键词：
buckwheat tea;;solid phase extraction;;gel permeation chromatography(GPC);;dispersive solid phase extraction(d-SPE);;GC-ECD;;herbicide residues
摘  要：
[Purpose] Four sample treatment methods [SPE( florisil) 、SPE( NH_2-Carb) 、GPC、d-SPE( PSA + C18) ] were developed for the simultaneous determining of 31 pesticide residues in Buckwheat tea by gas chromatography-electron capture detector. The 31 pesticide analytes contained organochlorine and pyrethroid pesticide residues. [Method] Comparison of the four treatment methods was investigated and on performances including the effect of purification on blank matrix,matrix effect,and the recoveries of different level. [Results] The florisil solid phase extraction cartridge method gave the less interference of blank matrix,weakest matrix effect,best stability and this methodcould guarantee recoveries in the range of 70% and 120% for most of the pesticides except fluoride and its metabolites. The NH_2-Carb solid phase extraction cartridge could guarantee recoveries in the range of 70% and 120% for most of the pesticides including fluoride and its metabolites,which was suitable for analysis and detection of multi-pesticide residues,but this method was unfriendly to the environment. The stability of GPC was weak. d-SPE( PSA + C18) method was a simple and fast method,but the recoveries was too high which would be improved by using internal standard or change the amount of dispersed solid phase extraction agent. [Conclusion] The studies provided data support for how to choose a suitable method which could be used to detect 31 pesticide residues in buckwheat tea.

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