离子迁移谱快速测定食品中熏蒸剂溴甲烷  

Rapid Determination of Fumigant Methyl Bromide in Foods by Ion Mobility Spectrometry

作　　者：常春艳[1] 葛含光 王利强[1] 王云凤[1] 葛宝坤[1] 王永芳[1] 

机构地区：[1]天津出入境检验检疫局,天津300461

出　　处：《食品研究与开发》2016年第14期116-119,共4页Food Research and Development

基　　金：天津出入境检验检疫局科技计划项目(TK084-2013)

摘　　要：建立离子迁移谱快速检测食品中熏蒸剂溴甲烷的方法。对样品前处理和检测仪器进行了参数优化后,在顶空条件下,提取溶剂为饱和氯化钠水溶液,离子迁移谱为负离子模式,载气高纯空气,进样口温度60℃,检测器温度45℃,柱温40℃,漂流气流量250 m L/min,载气流量2 m L/min的条件下,溴甲烷的检出限(LOQ)为0.05 mg/kg;10次平行测量的相对标准偏差RSD<8.0%,单个样品的分析周期小于10 min。A method was developed for rapid determination of fumigant methyl bromide in foods by ion mobility spectrometry. The condition of the sample pretreatment and the detection instrument were optimized：headspace mode;the extraction solvent was saturated sodium chloride solution;ion mobility spectrometry was carried innegative ion mode;high pure air was used as carrier gas;the inlet temperature was set at 60 ℃;the detector temperature was set at 45 ℃;the column temperature was set at 40 ℃;drifting gas flow was 250 m L/min;carrier gas flow was 2 m L/min.The detection limit of methyl bromide（LOQ）was 0.05 mg/kg;the relative standard deviation of RSD 8.0 %（n=10）;the Individual samples analysis period was less than 10 min.

关 键 词：快速测定 离子迁移谱 溴甲烷 熏蒸剂 食品 

分 类 号：O657[理学—分析化学] TS207.5[理学—化学]