Background: Tobacco smoke is a toxic gas-phase cocktail consisting of a broad range of organics, and free radical intermediates. The formation of smoke from a burning cigarette depends on a series of mechanisms, including gen- eration of products by pyrolysis and combustion, aerosol formation, and physical mass transfer processes. Methods: The current study simulates the deposition of particulate matter on the human lung surface by trapping the tobacco smoke particulates in situ on silica gel. To mimic this phenomenon, the cigarette was smoked directly on siliga gel. The surface morphology of smoke condensate trapped on silica gel, and pure silica gel (control) was inves- tigated using a scanning electron microscope (SEM). Electron paramagnetic resonance (EPR) was used to explore the presence of free radicals on the particulate matter trapped on silica. Standard procedures for cigarette smoking (ISO 3402:1999) were adopted. The char yields of tobacco cigarette in the temperature range 200–700 °C was also investi- gated in an inert atmosphere using a quartz reactor. Results: SEM images showed the surface morphology of pure silica gel was smooth while silica gel on which ciga- rette smoke was smoked on contained particulates of various sizes. Generally, the particulate size of cigarette
Chemistry Central Journal – Springer Journals
Published: Aug 8, 2017
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