甲醇溶液直接吸收-离子液体富集-气相色谱-质谱法测定卷烟主流烟气中吡啶、喹啉和苯乙烯

建立了一种收集检测卷烟主流烟气中吡啶、喹啉和苯乙烯的方法,以甲醇(CH3OH)溶液为吸收液,直接收集吸烟机抽吸的卷烟主流烟气,采用BMIM]PF6离子液体萃取富集,气相色谱-质谱联用(GC/MS)技术定量分析卷烟主流烟气中的吡啶、喹啉和苯乙烯3种半挥发性物质,测定过程简便快速,结果准确可靠。本方法的线性关系良好,相关系数(r2)大于0.9995,吡啶、苯乙烯和喹啉的检出限分别为24.9,9.34和4.05ng/cig(每支烟),相对标准偏差(RSD)小于6.0%,加标回收率在90.6%～107.4%之间。

Determination of Pyridine,Quinoline and Styrene in Mainstream Smoke Trapped by Methanol Solution Direct-Ionic Liquid Gathering Coupled Gas Chromatography-Mass Spectrometry

A method was developed for the collection and determination of pyridine,quinoline and styrene in mainstream tobacco smoke.The mainstream smoke was direct trapped with 50% methanol solution from smoking machine,then extracted and concentrated by 1-butyl-3-methylimidazolium hexafluorophosphate(PF6),and analyzed with GC/MS.The established method was stable and precise and the results were accurate and credible.Good linear relations were observed with a correlation coefficient over 0.9995.The detection limits were 24.9,9.34 and 4.05 ng/cig for pyridine,styrene and quinoline respectively,the relative standard deviations were less than 6.0 %,and the recoveries were found in the range from 90.6% to 107.4%.