卷烟主流烟气气相物和总粒相物中有机酸的分析研究

Study on Organic Acid in Gas Phase and Total Particulate Matter of Mainstream Cigarette Smoke

以二氯甲烷-甲醇为萃取溶剂,N,O-双(三甲基硅基)三氟乙酰胺(BSTFA)为硅烷化试剂,采用配备氢火焰离子化检测器(FID)的气相色谱仪分别对卷烟主流烟气中气相物和总粒相物中甲酸、乙酸、硬脂酸等21种有机酸进行了定量分析。对样品主流烟气中气相物前处理硅烷化条件及有机酸萃取条件进行了优化,并采用气相色谱法对卷烟主流烟气中气相物和总粒相物中有机酸的含量进行了定量分析。该方法用于实际样品中挥发性有机酸分析时,回收率为88.12%～98.63%,相对标准偏差(RSD)为1.51%～8.38%。

21 organic acids including formic acid,acetic acid and stearic,extracted from the mainstream cigarette smoke with methylene chloride/methanol as the solvent,was determined by GC-FID after derivatization with N,O-Bis（trimethylsilyl）trifluoroacetamide.The parameters affecting the silylation and the extraction were studied,and the optimal experimental conditions were established.The proposed method has been applied to the determination of organic acids in mainstream cigarette smoke with recovery of 88.12%~98.63%.