S. Landsberger et al., DETERMINATION OF AIRBORNE CADMIUM IN ENVIRONMENTAL TOBACCO-SMOKE BY INSTRUMENTAL NEUTRON-ACTIVATION ANALYSIS WITH A COMPTON SUPPRESSION SYSTEM, Analytical chemistry, 65(11), 1993, pp. 1506-1509
Concentrations of cadmium, a toxic trace element, were measured in the
indoor air of several public places where environmental tobacco smoke
was present. Particulate-phase cadmium concentrations were determined
by analyzing air filter samples using epithermal instrumental neutron
activation analysis in conjunction with a Compton suppression gamma-r
ay detection system, in which the detection limit for cadmium was redu
ced to a few nanograms per filter. A cascade impactor and a personal f
ilter sampler were used to collect the indoor suspended particulate ma
tter for size-fractionated mass as well as total mass, respectively. R
esults show that where environmental tobacco smoke is present, cadmium
concentrations are significantly higher than background and that abou
t 80% of the cadmium found in indoor airborne particulate matter is as
sociated with particles with aerodynamic diameters less than 1.8 mum.
In one instance, airborne cadmium concentrations in a music club were
found to be 38 ng/m3, which is at least 30 times higher than back grou
nd.