卷烟烟丝段对烟气成分截留的分析方法

为考察主流烟气产生过程中烟丝段对烟气成分的截留作用，建立了卷烟烟丝段对烟气成分截留的分析方法。采用去滤嘴卷烟，非抽吸点燃，阴燃至15 mm形成稳定的燃烧锥后，用直线型吸烟机抽吸一口，将抽吸剩余烟丝段分切成多段，采用二氯甲烷萃取、GC-MS分析测定了每段烟丝截留成分的质量分数，共检测出32种成分，对分析方法进行了评价；选择截留量较大的6种烟气成分（烟碱、糠醛、糠醇、苯酚、4-甲基苯酚、吲哚）进行烟丝截留规律分析。结果表明:①烟丝段对烟气目标成分的截留率在12.0%~73.6%之间；②紧邻燃烧锥的前25 mm烟丝段对烟气成分的截留作用较强，可能主要为烟气的冷凝吸附作用；烟丝后段的截留作用较弱，主要为气溶胶颗粒的截留。该方法可以用于烟丝段对32种主流烟气成分的截留规律研究。 

Filtration of aerosol components in mainstream cigarette smoke by tobacco section

To investigate the filtration effect of tobacco rod on smoke components in mainstream smoke, a method for analyzing the filtration by the residual tobacco section to smoke components was developed. A cigarette without its filter was lit without puffing and smouldered to the marked position of 15 mm to form a stable combustion cone, and following a puff by a linear smoking machine the residual tobacco section was cut into multiple subsections. The contents of 32 aerosol components filtered by each subsection were determined by GC-MS after extracting with dichloromethane. Six major smoke components, including nicotine, furfural, furfuryl alcohol, phenol, 4-methylphenol and indole, were selected as markers to reflect the filtration rules of tobacco section. The results showed that: 1) The filtration efficiencies of tobacco section to the target smoke components were between 12.0% and 73.6%. 2) The first subsection of 25 mm length adjacent to the combustion cone had stronger filtration to smoke components, which might be attributed to the condensation and adsorption of components in vapor phase. In comparison, the downstream subsection of tobacco rod had a weaker filtration effect, which mainly filtrated aerosol particles. This method is suitable to study the filtration rules of tobacco section to the 32 mainstream smoke components.