Landsberger S, Larson S, Wu D
Department of Nuclear Engineering, University of Illinois, Urbana 61801.
Anal Chem. 1993 Jun 1;65(11):1506-9. doi: 10.1021/ac00059a004.
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-ray detection system, in which the detection limit for cadmium was reduced to a few nanograms per filter. A cascade impactor and a personal filter sampler were used to collect the indoor suspended particulate matter for size-fractionated mass as well as total mass, respectively. Results show that where environmental tobacco smoke is present, cadmium concentrations are significantly higher than background and that about 80% of the cadmium found in indoor airborne particulate matter is associated with particles with aerodynamic diameters less than 1.8 microns. In one instance, airborne cadmium concentrations in a music club were found to be 38 ng/m, which is at least 30 times higher than background.
对存在环境烟草烟雾的几个公共场所的室内空气进行了有毒微量元素镉浓度的测量。通过使用超热仪器中子活化分析结合康普顿抑制伽马射线检测系统分析空气过滤器样品来测定颗粒相镉浓度，其中镉的检测限降低到每个过滤器几纳克。分别使用级联撞击器和个人过滤器采样器收集室内悬浮颗粒物，以获得粒径分级质量和总质量。结果表明，在存在环境烟草烟雾的地方，镉浓度明显高于背景值，并且室内空气中颗粒物中发现的镉约80%与空气动力学直径小于1.8微米的颗粒有关。在一个案例中，发现一家音乐俱乐部的空气中镉浓度为38纳克/立方米，至少比背景值高30倍。
