Personal Atmospheric Gas Sampler with Critical Orifice. Part I. Development and Evaluation.

摘要

A small, lightweight, portable personal sampler designed for collecting time-integrated air samples has been developed. This device uses the critical orifice concept with an evacuated container. Thus the sampling interval is dictated by the size of the orifice and volume of the sampler container. Through proper selection of orifices, this technique is capable of detecting concentration transients or will sample constantly for intervals up to 8 hours with a 100-cc container (shirt-pocket sampler). The personal sampler has been used to evaluate atmospheres containing the contaminants CO, CH4, CO2, CF2Cl2, CFCl3, C2H6, CH2=CHCl, CH2=CCl2, C6H14, and C6H6. (Author)