Aerosol size distribution measurement of electronic cigarette emissions using combined differential mobility and inertial impaction methods: Smoking machine and puff topography influence
Aerosol size distribution measurement of electronic cigarette emissions using combined differential mobility and inertial impaction methods: Smoking machine and puff topography influence
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DOI：
10.1080/02786826.2018.1513636
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发表时间：
2018-11-02
影响因子：
5.2
通讯作者：
Clark, Pamela I.
中科院分区：
文献类型：
--
作者：
Mikheev, Vladimir B.;Ivanov, Alexander;Clark, Pamela I.
应用实时高分辨率气溶胶差分迁移率光谱仪（DMS 500）和电低压撞击器（用作传统撞击器）的组合，通过称重撞击器级上收集的气溶胶的质量，同时收集实时数据和分析粒度。在各种抽吸流速下测试了不可再填充的固定功率以及可再填充和功率可调节的电子烟（e-cigs）。使用了两种类型的吸烟机：烟雾循环模拟器，其提供瞬时直接样品输送到分析仪和人体轮廓泵，其利用两个同步活塞并通过样品推拉模式操作。使用质子核磁共振方法对电子液体的主要成分（丙二醇、植物甘油、水和尼古丁）进行化学分析。通过液相色谱-飞行时间质谱法分析在撞击器阶段收集的有限数量的样品，以发现电子烟气溶胶中新形成的半挥发性或低挥发性有机化合物，并通过透射电子显微镜检查电子烟排放物中纳米颗粒的存在。微分迁移率和惯性冲击法显示出相当的粒度结果。气溶胶产生方法（吸烟机的类型）以及抽吸地形影响电子烟颗粒大小。在电子烟气溶胶中发现了新形成的半挥发性或低挥发性有机化合物以及金属纳米颗粒。版权所有（c）2018美国气溶胶研究协会
A combination of a real-time high resolution aerosol differential mobility spectrometer (DMS500) and an electrical low pressure impactor (used as a traditional impactor) was applied to simultaneously collect real-time data and analyze particle size by weighing the mass of the aerosol collected on the impactor stages. Nonrefillable fixed-power as well as refillable and power adjustable e-cigarettes (e-cigs) were tested at various puffing flow rates. Two types of smoking machines were used: a smoke cycle simulator that provides instantaneous straight sample delivery to the analyzer and a Human Profile Pump that utilizes two synchronized pistons and operates by sample pull-push mode. Chemical analysis of the major components of e-liquid (propylene glycol, vegetable glycerol, water, and nicotine) was made using a proton nuclear magnetic resonance method. Limited amounts of samples collected on impactor stages were analyzed by liquid chromatography time-of-flight mass-spectrometry to find newly formed semi- or low-volatile organic compounds in e-cig aerosol and by transmission electron microscopy to check for the presence of nanoparticles in e-cig emissions. Differential mobility and inertial impaction methods showed comparable particle size results. Method of aerosol generation (type of the smoking machine) as well as puffing topography affected the e-cig particle size. Newly formed semi- or low-volatile organic compounds as well as metal nanoparticles were found in e-cig aerosol. Copyright (c) 2018 American Association for Aerosol Research