Characterization of airborne particles emitted by an electrically heated tobacco smoking system
Characterization of airborne particles emitted by an electrically heated tobacco smoking system
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DOI：
10.1016/j.envpol.2018.04.137
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发表时间：
2018-09-01
影响因子：
8.9
通讯作者：
Buonanno, G.
中科院分区：
文献类型：
--
作者：
Pacitto, A.;Stabile, L.;Buonanno, G.
吸烟活动被认为是人群的主要危险因素。事实上，主流烟雾气溶胶被吸烟者直接吸入，然后将有害化合物输送到肺部的最深区域。为了降低吸烟的潜在风险，最近开发了不同的尼古丁递送产品。最新发布的设备是一种电加热烟草系统（iQOS（R），菲利普莫里斯），它能够在不燃烧的情况下加热烟草。在本论文中，通过测量主流气溶胶中的颗粒数、浓度和分布，对iQOS生成的颗粒进行了尺寸和挥发性表征。实验分析是通过一个冷凝颗粒计数器，一个快速流动的颗粒粒度仪和热稀释采样系统，允许在不同温度下的气溶胶采样。根据实测数据和典型吸烟模式估算了吸烟者所受的颗粒物表面积剂量，主流气溶胶中的颗粒物数浓度低于1 × 10（8）份。cm（-3），粒子数分布模式约为100 nm。尽管如此，挥发性分析显示iQOS产生的颗粒的挥发性部分的量高，实际上，在300 ℃下进行的取样证实了显著的颗粒收缩现象（约20 nm的模式）。无论如何，在较高的采样温度下，颗粒数浓度在统计上不会降低，这表明在排放的颗粒中总是存在非挥发性部分。吸烟者接受的剂量（以颗粒表面积的非挥发性量计）等于每次抽吸1-2 mm（2），即比电子香烟vapers接受的剂量大4倍。(C)2018爱思唯尔有限公司版权所有。
Smoking activities were recognized as a main risk factor for population. Indeed, mainstream smoke aerosol is directly inhaled by smokers then delivering harmful compounds in the deepest regions of the lung. In order to reduce the potential risk of smoking, different nicotine delivery products have been recently developed. The latest device released is an electrically heated tobacco system (iQOS (R), Philip Morris) which is able to warm the tobacco with no combustion. In the present paper a dimensional and volatility characterization of iQOS-generated particles was performed through particle number concentration and distribution measurements in the mainstream aerosol. The experimental analysis was carried out through a condensation particle counter, a fast mobility particle sizer and a thermo-dilution sampling system allowing aerosol samplings at different temperatures. Estimates of the particle surface area dose received by smokers were also carried out on the basis of measured data and typical smoking patterns.The particle number concentrations in the mainstream aerosols resulted lower than 1 x 10(8) part. cm(-3) with particle number distribution modes of about 100 nm. Nonetheless, the volatility analysis showed the high amount of volatile fraction of iQOS-generated particles, indeed, samplings performed at 300 degrees C confirmed a significant particle shrinking phenomena (modes of about 20 nm). Anyway, the particle number concentration does not statistically decrease at higher sampling temperatures, then showing that a non-volatile fraction is always presents in the emitted particles. The dose received by smokers in terms of non-volatile amount of particle surface area was equal to 1-2 mm(2) per puff, i.e. up to 4-fold larger than that received by electronic cigarette vapers. (C) 2018 Elsevier Ltd. All rights reserved.