卷烟主流烟气气溶胶分布研究

对卷烟主流烟气气溶胶分布进行了研究,按照标准吸烟条件,对4个卷烟进行了测试,通过在线200倍稀释,采用测量范围在7～10000 nm的电子低压撞击器对气溶胶粒径和浓度进行了测试。试验结果表明,不同卷烟主流烟气气溶胶分布有一定的差异,烟气气溶胶浓度随抽吸口数增加而增加,所测试的A、D样品气溶胶最高浓度粒径出现在0.261～0.381μm,B、C样品卷烟气溶胶最高浓度粒径出现在0.028μm;A、D样品卷烟气溶胶平均粒径为0.23μm,而B、C样品卷烟平均粒径为0.16μm;4种卷烟主流烟气气溶胶平均浓度介于1.09×109～2.21×109个/cm3之间,而相应每支烟的总粒子数介于2.29×1011～3.88×1011个粒子。

Research on particle size distribution in cigarette mainstream smoke aerosols

In order to study the particle size distribution of aerosols in mainstream smoke of different cigarette brands, four samples were tested according to a standard regime. After on-line 200:1 dilution, particle diameter and number concentration were directly conducted by using electrical low pressure impactor (ELPI) with a measurement range from 7-10000 nm. The re-sults showed that, the particle size distribution differed in different cigarette brands. During the smoking process, the concen-tration of smoke aerosols increased puff by puff. The profile of aerosol size distribution peaked in the range of 0.261～10.381 micron for samples A and D, and 0.028 micron for samples B and C. Median particle diameter was 0.23 micron for samples A and D, and 0.16 micron for samples B and C. The average aerosol concentration of the four samples was between 1.09× 10~9p/cm~3 and 2.21×10~9p/cm~3, and a similar pattern of particle number was observed with a range from 2.29×10~(11) to 3.88 ×10~(11) particles per cigarette.