10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
Detail Characterization of Aerosol Physical Properties of Mainstream and Sidestream Cigarette Smoke
TA-CHIH HSIAO, Ying-Jyun Chen, Hsiao-Chi Chuang, Chin-Sheng Tang, National Central University
Abstract Number: 239 Working Group: Aerosol Exposure
Abstract Mainstream cigarette smoke is a major concern for smokers, and the sidestream cigarette smoke contribute to the neighboring people through passive smoking. Many studies have established mathematical models to predict the particle depositions in different regions of the respiratory tract. The particle size distribution (PSD), density, charging status and morphology are known as the important parameters affecting the deposition fraction. However, most of the studies solely address the importance of PSD. In this study, the aerosol physic properties of cigarette smoke particles are characterized and studied for the dose of respiratory deposition.
For conducting the well-controlled experiments, an automatic cigarette smoke generator(Smoking Machine) was designed and manufactured. It can host 16 cigarettes and control the individual ignition time. Following the Smoking Machine, an aerosol dilutor was used to avoid exceeding the upper detection limits of aerosol instruments and suppressed the particle coagulation for high-concentration cigarette smoke. The dilution factors are 1:200 and 1:80 for mainstream smoke and sidestream smoke respectively. The particle size distribution was measured by scanning mobility particle sizer (SMPS, TSI 3936). Aerotrak (TSI 9000) was used to measure the particle surface area concentration deposited in the alveolar region. Aethalometer (Magee AE31) and DustTrak (TSI 8530) were employed to measure the BC and PM2.5 mass concentrations respectively. In addition, the novel tandem DMA-AE31 system was established to provide the size selective BC and UVPM mass concentrations of cigarette smoke. Aerosol Electrometer (AE, TSI 3068B) was applied to determine the average electric charge of particles. At the same time, Aerosol Particle Mass Analyzer (APM, Kanomax 3601), the widely used real-time aerosol mass classification instrument, was used to tandem with DMA and SMPS (a.k.a. DMA-APM and APM-SMPS tandem systems) to estimate the effective density of mainstream and sidestream smokes in different size ranges. Some of these aerosol characteristics of cigarette smoke particles are first time being revealed and valuable for lung deposition and inhalation toxicity studies.