| 加速溶剂萃取-气相色谱-负化学源质谱法测定茶叶中有机氯和拟除虫菊酯类农药残留量 |
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| 引用本文： | 胡贝贞,沈国军,邵铁锋,谢丽萍.加速溶剂萃取-气相色谱-负化学源质谱法测定茶叶中有机氯和拟除虫菊酯类农药残留量[J].分析试验室,2009,28(1). |
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| 作者姓名： | 胡贝贞 沈国军 邵铁锋 谢丽萍 |
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| 作者单位： | 绍兴出人境检验检疫局,绍兴,312000 |
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| 摘 要： | 建立了茶叶中13种有机氯和10种拟除虫菊酯农药残留量的气相色谱-负化学离子源.质谱(GC-NCl-MS)分析方法.茶叶样品用V(丙酮):V(CH2Cl2)=1:1混合液作提取剂经加速溶剂萃取,提取液经凝胶色谱净化除去大部分的色素、脂类和蜡质,再经活性炭-氨基(Carb-NH2)复合小柱和Florisil小柱净化后,用GC-NCl-MS的选择离子监测方式(SIM)进行定性和定量分析.添加50μg/kg 浓度水平时,农药回收率在45.6%～112.4%之间,相对标准偏差在0.57%～10.1%之间;方法的检出限(3倍信噪比)在0.05～10.0μg/kg之间.方法适用于出口茶叶农残检测实际工作.
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| 关 键 词： | 加速溶剂萃取 茶叶 负化学离子源 有机氯 拟除虫菊酯 |
Determination of organochlorine and pyrethroid pesticide residues in tea by accelerated solvent extraction and gas chromatography-negative chemical ionization-mass spectrometry |
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| HU Bei-zhen,SHEN Guo-jun,SHAO Tie-feng,XIE Li-ping.Determination of organochlorine and pyrethroid pesticide residues in tea by accelerated solvent extraction and gas chromatography-negative chemical ionization-mass spectrometry[J].Chinese Journal of Analysis Laboratory,2009,28(1). |
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| Authors: | HU Bei-zhen SHEN Guo-jun SHAO Tie-feng XIE Li-ping |
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| Institution: | Shaoxing Entry-Exit Inspection and Quarantine Bureau;Shaoxing 312000 |
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| Abstract: | A gas chromatography-negative chemical ionization mass spectrometric (GC-NCI-MS) method has been de- veloped for analyzing 23 kinds of organochlorine and pyrethroid pesticides in tea.The target analytes were extracted with acetone/dichloromethane (V/V,1:1) through accelerated solvent extraction (ASE),purified by gel permeation chromatography (GPC) to eliminate the great mass of coextracts such as pigments,fat and waxiness,and then further cleaned by Carb-NH_2 and florisil solid-phase extraction (SPE) cartri... |
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| Keywords: | Accelerated solvent extraction Tea Negative chemical ionization Organochlorine Pyrethroid |
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