Evaluation of Contact Columns for Nitrogen Dioxide Absorption

L. Pierce Assistant Public Health Chemists, Air and Industrial Hygiene, Laboratory and Air Sanitation Engineering Associate, Bureau of Air Sanitation, California State Department of Public Health, Berkeley, California, USA

Y. Tokiwa Assistant Public Health Chemists, Air and Industrial Hygiene, Laboratory and Air Sanitation Engineering Associate, Bureau of Air Sanitation, California State Department of Public Health, Berkeley, California, USA

K. Nishikawa Assistant Public Health Chemists, Air and Industrial Hygiene, Laboratory and Air Sanitation Engineering Associate, Bureau of Air Sanitation, California State Department of Public Health, Berkeley, California, USA

Abstract

The absorption efficiencies of 6–, 10–, IS–, and 60-turn spiral contact columns for two formulations of Saltzman reagent are evaluated for use in atmospheric nitrogen dioxide analyzers at several air and liquid flow rates. Response times for the several columns as a function of flow rates and absorbing reagent are also given. The recommended column and reagent are indicated. The technique of adjusting instrument parameters for direct readout of NO₂ concentrations is described.

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Evaluation of Contact Columns for Nitrogen Dioxide Absorption

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Evaluation of Contact Columns for Nitrogen Dioxide Absorption

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