Abstract
A method is described for the radiolabelling of the particulate phase of aged and diluted sidestream tobacco smoke. 212Pb is a decay product of thorium, and has been used for radiolabelling aged and diluted sidestream tobacco smoke in situ. The radiolabelled aerosol is suitable for use in studies with human volunteers, and allows the study of deposition in and clearance from the respiratory tract. This radiolabelled aerosol is also suitable as a marker of lung deposition and clearance of the attached fraction of radon, thoron and their progeny. Thus, the marker has potential for use in examining the dosimetry of radon, thoron and environmental tobacco smoke (ETS) in a variety of situations.
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