抽吸参数对电加热卷烟气溶胶粒数和粒径的影响

为研究抽吸参数对电加热卷烟气溶胶粒数和粒径的影响，采用吸烟循环模拟机-快速粒径谱仪测试电加热卷烟气溶胶的粒数浓度和粒数分布，考察了抽吸容量（35、55、75 mL）、抽吸持续时间（2、3、4 s）和抽吸间隔（30、60 s）对电加热卷烟气溶胶粒数浓度和粒数中值粒径的影响。结果表明:①在单口方波抽吸条件下，电加热卷烟气溶胶的粒数浓度随抽吸过程实时降低，粒数中值粒径随抽吸过程实时变小；②抽吸容量和抽吸间隔的增大可明显增加气溶胶的粒数浓度；当抽吸容量增加至75 mL时，粒数中值粒径降低；抽吸间隔对粒数中值粒径无影响。③抽吸持续时间对电加热卷烟气溶胶粒数浓度和粒数中值粒径的影响均较小。 

Effects of puffing parameters on aerosol particle number and size from electrically heated tobacco products

To study the influences of puffing parameters on aerosol particle number and size from electrically heated tobacco products (eHTPs), a smoking cycle simulator-differential mobility spectrometer (SCS-DMS) was used for characterizing the particle number concentration and count median diameter (CMD) of the eHTP aerosol under different puffing parameters with the puffing volume of 35, 55, 75 mL, the puffing duration of 2, 3, 4 s, and the puffing interval of 30, 60 s respectively. The results showed that: 1) During single puff under square wave smoking regime, the particle number concentration of the aerosol from eHTP decreased and the count median diameter became smaller in real time with the proceeding of puffing. 2) The increases of puffing volume and puffing interval evidently increased particle number concentration of aerosol. When the puffing volume increased to 75 mL, the CMD of the aerosol was reduced. Puffing interval had no obvious effect on CMD. 3) Puffing durations slightly influenced the particle number concentration and CMD of the aerosol from eHTP.