Passive Sampling of Ambient and Work Place Atmospheres by Means of Gas Permeation

Abstract

Sampling is often the most critical and most difficult step in the analytical process. Passive sampling of atmospheres holds great promise in the study of ambient air and work place atmospheres. The permeation of gases through membranes has been introduced as a means for passive sample collection that provides both accuracy and convenience. The permeation technique has the advantage that it is relatively free from disturbing effects such as variations in temperature, humidity, movement and the presence of copollutants. Because no power is required the sampling units are small, light, convenient and essentially indestructible. Thus, permeation devices offer the ideal approach for personal monitors and fills a unique need for industrial hygiene studies.