【摘要】 为了考察主流烟气气相成分的逐口释放特征,建立了在线分析卷烟主流烟气中丙烯腈、丙烯醛、巴豆醛、苯、甲苯、吡啶和苯乙烯7种有机化合物的大气压化学电离串联质谱(APCI-MS/MS)方法。通过改造将吸烟机与APCI-MS离子源连接,卷烟主流烟气经剑桥滤片过滤后,气相部分被直接引入到APCI-MS离子源内进行分析。结果表明:7种有机化合物定量分析标准工作曲线线性关系较好(R2>0.99),检测限和相对标准偏差分别为0.016~2.05 ng/mL和2.63%~8.89%。卷烟主流烟气气相物中7种有机化合物的单口及总释放量差异较大,逐口释放特征也存在差异。该方法操作简单、响应快速、灵敏度高、稳定性好,适合用于卷烟烟气的逐口释放特征研究。更多还原

【Abstract】 In order to investigate the puff-by-puff release characteristics of gas phase of mainstream cigarette smoke(MSS), an atmospheric pressure chemical ionization tandem mass spectrometry(APCI-MS/MS) method was developed for on-line analysis of seven organic compounds, including acrylonitrile, acrolein, crotonaldehyde, benzene, toluene, pyridine and styrene, in gas phase of MSS. A smoking machine was modified to couple with an APCI-MS ion source, after passing through a Cambridge filter, the gas phase of MSS was directly introduced into the APCI-MS ion source for analysis. The results showed that: The calibration curves of the organic compounds exhibited good linear relations(R2> 0.99) with the limits of detection from 0.016 to 2.05 ng/mL and the relative standard deviations(RSDs) from 2.63% to 8.89%. The single puff and total yields of the said organic compounds differed tremendously, and did the puff-by-puff release characteristics of the organic compounds. This method is simple, fast, sensitive, repeatable and suitable for the investigation of puff-by-puff release characteristics of MSS.更多还原