| 茶叶中多种农药残留测定方法研究 |
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| 引用本文： | 侯雪,;易盛国,;韩梅,;邱世婷,;雷绍荣.茶叶中多种农药残留测定方法研究[J].现代科学仪器,2014(2):125-132. |
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| 作者姓名： | 侯雪 ;易盛国 ;韩梅 ;邱世婷 ;雷绍荣 |
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| 作者单位： | [1]四川省农业科学院分析测试中心,成都610066; [2]中国科学院成都有机化学研究所,成都610041; [3]中国科学院研究生院,北京100049 |
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| 摘 要： | 采用气相色谱-串联质谱法同时测定了茶叶中多种农药残留。样品加水后用乙腈提取,采用GCB/PSA固相萃取柱净化,淋出液浓缩至近干后用正己烷-丙酮（9：1,V/V）溶液定容,气相色谱-串联质谱测定。结果表明目标农药添加于样品中质量浓度在0.050～0.500mg/kg（r〉0.9700）范围内与峰面积呈线性关系,检出限（3S/N）位在0.1～37.5ng/g之间。加入0.100和0.400mg/kg两个浓度水平的农药标准溶液,目标农药的回收率在66.5%～114.7%之间,相对标准偏差（n=5）均小于20%。
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| 关 键 词： | 茶叶 气相色谱-串联质谱法 多农药残留 |
Research on Determination of Multi-pesticide Residues in Tea |
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| Affiliation: | Hou Xue ,Yi Shengguo,Han Mei,Qiu Shiting,Lei Shaorong(1.Analysis and Testing Centre,Sichuan Academy of Agricultural Sciences,Chengdu 610066,PR China;2.Chengdu Institute of Organic Chemistry Chinese Academy of Sciences,Chengdu 610041,P.R.China;3Graduate School of Chinese Academy of Sciences, Beijing 100049,P.R.China) |
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| Abstract: | Gas chromatography-tandem mass spectrometry （GC-MS/MS） method was developed for simultaneous analysis of multi-pesticide residues in tea. The sample was extracted with acetonitrile after the procedure of water addition; GCB/PSA solid-phase extraction （SPE） column was employed during clean-up step.The eluate was evaporated to near dryness and diluted with mixture of n-hexane and acetone （9：1,V/V）,and then determined with a MS/MS detector based on MRM.Linear relationships between values of peak area,and mass concentration of the targeted pesticides were obtained in the range of 0.050-0.500 mg/L （r〉0.9700） and the detection limits （3S/N） of this method were 0.1-37.Sng/g.When the spiked levels were 0.100 and 0.400mg/kg,the average recoveries ranged from 66.5 % to 114.7 % with RSDs （n=5） 〈20%. |
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| Keywords: | Tea GC-MS/MS Multi-pesticide residues |
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