摘要
建立了顶空气相色谱-质谱联用测定烟草中磷化氢残留的方法。样品在顶空进样器40℃下恒温振荡进样,经气相色谱Elite-624毛细管柱(60 m×320μm×1.8μm)分离,质谱检测器SIR模式下监测质荷比为34的离子碎片测定。结果表明:①在0.25～5.00μg/L范围内方法线性良好,检出限0.0019μg/g,平均回收率90.29%,相对标准偏差4.54%(n=6)。②采用该方法测定烟草中的磷化氢残留,简便,安全,准确。
A headspace gas chromatography-mass spectrometry method was developed for determining phosphine residue in tobacco. The sample was injected after being oscillated at 40℃in headspace sampler, then separated on GC Elite-624 capillary column （60 m×320μm × 1.8μm）, and finally determined by mass spectrometry monitoring ion fragment （m/z=34） under SIR mode. The results showed that： 1） Good linearity was achieved when the content of PH3 ranged from 0.25-5.00 μg/L. The detection limit, average recovery and relative standard deviation （RSD） （n=6） were 0.0019 pg/g, 90.29% and 4.54%, respectively. 2） This method was simple, safe and accurate for determining phosphine residue in tobacco.
出处
《烟草科技》
EI
CAS
北大核心
2013年第8期58-61,共4页
Tobacco Science & Technology
关键词
烟草
磷化氢
顶空气相色谱-质谱法
Tobacco
Phosphine
Headspace gas chromatography-mass spectrometry
