摘要
建立了气相色谱-质谱检测8种植物源性食品中联苯菊酯残留量的方法。粮谷类样品采用乙腈提取、凝胶渗透色谱（GPC）结合Florisil固相萃取柱净化；蔬菜类样品采用乙酸乙酯提取、Florisil固相萃取柱净化，然后采用气相色谱-质谱测定，选择离子监测模式检测。方法的检出限为5μg／kg（S/N=10）；在0．005～0．5mg／L范围内呈现良好的线性关系，相关系数为0．9999；在0．005，0．04和0．1mg／kg3个添加水平下，联苯菊酯的添加回收率在74％～99％之间，相对标准偏差（RSD）小于13％。该方法灵敏度高，净化效果良好，能有效地消除复杂基质带来的干扰，可以作为日常样品中联苯菊酯残留量的检测和确证方法。
A method was established for the determination of bifenthrin residue in 8 plant-based foods using gas chromatography-mass spectrometry （GC-MS）. The grain was extracted by acetonitrile and cleaned up with gel permeation chromatography （GPC） combined with a Florisil solidphase extraction （SPE） cartridge, while the vegetables and fruits were extracted by ethyl acetate and cleaned up only with a Florisil SPE cartridge. Most of the lipids in the extract for the grain were eliminated by GPC, prior to SPE cleanup. The cleaned extract was analyzed by GC-MS with electron impact （EI） source in selective ion monitoring （SIM） mode. The detection limit was 5 vg/kg （S/N = 10）. There was a good linearity within the range of 0. 005 -0. 5 mg/L with the correlation coefficient of 0. 999 9. The recoveries were between 74% - 99% with the relative standard derivations of less than 13% at the spiking levels of 0. 005, 0. 04 and 0. 1 mg/kg.
出处
《色谱》
CAS
CSCD
北大核心
2009年第1期82-85,共4页
Chinese Journal of Chromatography
基金
国家质检总局基金资助项目(No.2006B425)
关键词
凝胶渗透色谱
固相萃取
气相色谱-质谱法
联苯菊酯
植物源性食品
gel permeation chromatography （GPC）
solid-phase extraction （SPE）
gas chromatography-mass spectrometry （GC-MS）
bifenthrin
plant-based foods
