An Evaluation of Techniques for the Measurement of Low Concentrations of Trace Gases in the Atmosphere.

摘要

A research experiment was conducted from Wilmington,North Carolina to the vicinity of the equator and return. Ozone,total oxidant,carbon monoxide;and methane concentrations were measured and comparative evaluation of the chemiluminescent and coulometric techniques for measuring ozone and oxidant of low atmospheric concentrations was conducted. The results suggest that both the chemiluminescent and coulometric measurement techniques will provide useful data at the low concentrations found in a relatively unpolluted marine environment. The chemiluminescent meter is more reliable than the coulometric meter under the conditions encountered. Although a precise quantitive estimate of the accuracy of the two techniques cannot be made on the basis of the data obtained,the evidence indicates that the chemiluminescent technique is significantly more accurate. (Author)