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投稿时间：2024-06-02
投稿时间：2024-06-02
中文摘要: 该文建立静态顶空气进样-气相色谱串接飞行时间质谱快速检测芝麻油中四氯乙烯的分析方法，并用该方法对市售197批次芝麻油进行四氯乙烯筛查。芝麻油经称量后于顶空瓶中加热平衡，进入气相色谱系统，以DB-624毛细管色谱柱（30 m×0.25 mm，1.4 μm）分离，飞行时间质谱测定，基质曲线外标法定量。结果表明，四氯乙烯在0.5～10 μg/kg线性范围内呈良好线性，线性相关系数R2为0.999 7；方法定量限为0.5 μg/kg，在标准曲线范围内进行加标回收试验，加标回收率为93.4%～112.2%，相对标准偏差（relative standard deviations，RSD）为1.2%～2.0%。对市售芝麻油197批次进行测定，未检出阳性样品。
Abstract:An analytical method for the rapid detection of tetrachloroethylene in sesame oil was developed based on static headspace-gas chromatography tandem time-of-flight mass spectrometry. This method was employed to examine tetrachloroethylene in 197 batches of commercially available sesame oil. Sesame oil was heated and equilibrated in a headspace vial，introduced into the gas chromatography system，separated by a DB-624 chromatographic column（ 30 m×0.25 mm，1.4 μm），and quantified by time-of-flight mass spectrometry via a matrix curve external standard method. The results indicated that tetrachloroethylene exhibited good linearity within the range of 0.5 to 10 μg/kg，with R2 of 0.999 7. The limit of quantification was 0.5 μg/kg. Recovery experiments conducted within the standard curve range showed recovery rates ranging from 93.4% to 112.2%，with relative standard deviations （RSDs） between 1.2% and 2.0%. Among the 197 batches of commercially available sesame oil analyzed，no batch tested positive for tetrachloroethylene.
keywords: sesame oil tetrachloroethylene time-of-flight mass spectrometry static headspace residual solvent
文章编号：202518018 中图分类号： 文献标志码：
基金项目:市场监督管理总局科技计划项目（2022MK081）；河南省市场监督管理局科技计划项目（2022sj53）
| Author Name | Affiliation |
| MA Jun | Henan Institute of Product Quality Inspection Technology,Zhengzhou 450000,Henan,China |
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