School of Basic Medical Sciences, North Sichuan Medical College, Nanchong, 637000, Sichuan, China; Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China.
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China.
Environ Res. 2021 Nov;202:111790. doi: 10.1016/j.envres.2021.111790. Epub 2021 Jul 28.
This study analyzed the size-resolved chemical compositions of cigarette-burning particles (CBPs). CBPs in the size range of 0.2-2.0 μm were characterized using a single particle mass spectrometer (SPAMS). CBPs were found to contain polycyclic aromatic hydrocarbons (PAHs), organonitrate, vinylpyridine, indene, guaiacol, methylindane, and metals such as Fe, Cr, Mn, and Cu. Fresh CBPs showed a single modal size distribution which peaked at 0.40 μm. CBPs in the size range of 0.5-0.1 μm contained more biomass burning markers (K, KCl, and levoglucosan), sulfate, naphthalene, and methylindane than CBPs in the size range of 0.2-0.5 μm. Nicotine is favorable to uptake on large particles (>0.5 μm). Among all particles, 57% contained PAHs. Heavy metals Fe, Mn, Cr, and Cu had mixing ratios of 0.06, 0.57, 0.26, and 0.34 respectively; nicotine and guaiacol had mixing ratios of 0.26 and 0.27; and vinylpyridine, indene, and methylindane had mixing ratios of 0.54, 0.55, and 0.65 respectively. Four particle types were resolved: cigarette-burning biomass burning (CB-BB, 50.3%), CB-BB-Metals (49.3%), CB-Nicotine (0.3%), and CB-Aged (0.1%). These results improve the scientific understanding of CBPs and provide useful references for smoking exposure studies that consider the size-resolved chemical compositions and mixing states of particle-phase components. The result can also benefit the study of exposure to secondhand smoking.
本研究分析了香烟燃烧颗粒物（CBPs）的粒径分布化学组成。使用单颗粒质谱仪（SPAMS）对 0.2-2.0μm 粒径范围内的 CBPs 进行了特征分析。结果表明，CBPs 中含有多环芳烃（PAHs）、有机硝酸盐、乙烯吡啶、茚、愈创木酚、甲基茚满和 Fe、Cr、Mn、Cu 等金属。新鲜 CBPs 呈现单一模态粒径分布，峰值出现在 0.40μm。0.5-0.1μm 粒径范围内的 CBPs 比 0.2-0.5μm 粒径范围内的 CBPs 含有更多的生物质燃烧标志物（K、KCl 和左旋葡聚糖）、硫酸盐、萘和甲基茚满。尼古丁有利于在大颗粒（>0.5μm）上被吸收。所有颗粒中，57%含有多环芳烃。重金属 Fe、Mn、Cr 和 Cu 的混合比分别为 0.06、0.57、0.26 和 0.34；尼古丁和愈创木酚的混合比分别为 0.26 和 0.27；乙烯吡啶、茚和甲基茚满的混合比分别为 0.54、0.55 和 0.65。解析出四种颗粒类型：香烟燃烧生物质燃烧（CB-BB，50.3%）、CB-BB-金属（49.3%）、CB-尼古丁（0.3%）和 CB-老化（0.1%）。这些结果提高了对 CBPs 的科学认识，为考虑颗粒相成分的粒径分布化学组成和混合状态的吸烟暴露研究提供了有用的参考。该结果还可以受益于二手烟暴露的研究。
