多壁碳纳米管固相萃取净化-气相色谱质谱联用同时测定茶叶中26种农药  

Determination of 26 pesticides in tea by gas chromatography-mass spectrometry with multi-walled carbon nanotubes as solid-phase

作　　者：陈啟荣[1] 杨明[1] 梁颖 朱琳娜[1] 邵鹏[1] 范筱京[1] 

机构地区：[1]北京市理化分析测试中心,北京市食品安全分析测试工程技术研究中心,北京100089

出　　处：《食品安全质量检测学报》2016年第4期1686-1693,共8页Journal of Food Safety and Quality

基　　金：北京市财政科技创新工程项目(PXM 2013_178305_000004)~~

摘　　要：目的建立一种多壁碳纳米管固相萃取净化-气相色谱质谱联用同时测定茶叶中26种农药的检测方法。方法样品经乙腈提取,过滤型多壁碳纳米管柱净化后,使用气相色谱质谱仪检测。结果碳纳米管净化能够有效去除茶叶中干扰物质,简化实验步骤,降低前处理过程中农药的分解。26种农药在0.04~1.6μg/m L范围内具有较好的线性。方法的检出限为0.005~0.05 mg/kg,定量下限为0.015~0.15 mg/kg。采用该方法对茶叶样品进行加标回收率实验,加标回收率在66.6%~125.5%,相对标准偏差为0.3%~6.4%（n=5）。结论该方法快速、准确、灵敏,适合茶叶中多种农药的同时测定。Objective To determine 26 pesticides in tea by solid-phase extraction with multi-walled carbon nanotubes and gas chromatography-mass spectrometry（GC-MS）. Methods The sample was extracted with acetonitrile. After purified by multi-walled carbon nanotubes, the sample solution was detected by GC-MS. Results The established method was simple, and could reduce the pesticides decomposition in pretreatment. The calibration curves of 26 pesticides were linear in the range of 0.04~1.6 μg/m L. The limits of detection for 26 pesticides in tea were in the range of 0.005~0.05 mg/kg, and their limits of quantitation were 0.015~0.15 mg/kg. The spiked recoveries of 26 pesticides in tea sample were between 66.6% and 125.5% with relative standard deviations of 0.3%~6.4%（n=5）. Conclusion The proposed method is rapid, accurate and sensitive, which is suitable for simultaneous detection of multiple pesticides.

关 键 词：多壁碳纳米管 茶叶 农药残留 气相色谱质谱联用法 

分 类 号：O657.63[理学—分析化学] TS272.7[理学—化学]