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| Determination of Multi-pesticide Residues in Green Tea by Nano Bamboo Charcoal-dSPE/Ultra High Performance Liquid Chromatography-Tandem Mass Spectrometry |
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| DOI：10.3969/j.issn.1004-4957.年份.月份 |
| KeyWord:tea pesticide residue nano Bamboo Charcoal QuEChERS ultra performance liquid chromatography-tandem mass spectrometry（UPLC-MS/MS） |
| Author | Institution |
| ZHOU Li,LUO Feng-jian,ZHANG Xin-zhong,JIANG Ya-ping,LOU Zheng-yun,LIU Guang-ming,CHEN Zong-mao* |
中国农业科学院茶叶研究所农产品质量安全研究中心 |
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| Abstract: |
| Applied in modified QuEChERS（Quick,Easy,Cheap,Effective,Rugged and Safe） method with nano Bamboo Charcoal（NBC） as sorbents for analysis of multi pesticide residues in green tea was developed.Pesticides in tea were extracted with acetonitrile-H2O followed by liquid-liquid partitioning by adding NaCl.The extract was cleaned up using the mixture of NBC-PSA（primary secondary amine）-MgSO4 in dispersive solid-phase step.After separated on an Acquity UPLC TSS-3 C18 column（100 mm×2.1 μm,1.8 μm）,the analytes were determined by ultra high performance liquid chromatography-tandem mass spectrometry（UPLC-MS/MS） under multiple reaction monitoring mode（MRM）,and quantified by the external standard method.The recoveries for 10 pesticides in tea sample in the fortified concentration range of 0.02-0.50 mg/kg ranged from 72.3% to 116.3% with relative standard deviations（RSD） of 1.4%-13.9%.The limits of quantitation（LOQs） were in the range of 0.02-0.04 mg/kg.The method could meet the requirements for pesticide residue analysis.Furthermore,the method is more commercial than other QuEChERS methods with advantage of low cost of NBC． |
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