Chemical Dissection of PM_2.5 in Cigarette Smoke: Main and Sidestream Emission Factors and Compositions.

ABSTRACT: Despite increasing evidence that cigarette smoke is a significant source of indoor fine particulate matter (PM_2.5), quantitative emission factors (EFs) for PM_2.5 and its toxic chemical composition in mainstream (MS) and sidestream (SS) smoke are still not well defined. In this study, we employed a custom-designed chamber to separately collect MS (intermittent puff) and SS (continuous sampling) smoke from eleven cigarette models, representing six brands and two product types, under controlled conditions. PM_2.5 was collected on quartz-fiber filters and analyzed for carbon fractions (using the thermal-optical IMPROVE-A protocol), nine water-soluble inorganic ions (by ion chromatography), and twelve trace elements (via ICP-MS). SS smoke exhibited significantly

SUBMITTER: Zhou Y 

PROVIDER: S-EPMC12473782 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature