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Dosimeter for oxides of nitrogen.
Ferber-BI; Sharp-FA; Freedman-RW
Am Ind Hyg Assoc J 1976 Jan; 37(1):32-36
A simple, lightweight, prototype dosimeter, based on wet chemical principles, has been developed for personal monitoring of nitrogen dioxide. A simple modification provides for the determination of nitrogen oxides. This device requires no auxiliary equipment and is intrinsically safe for use in coal mines. In use, nitrogen dioxide permeates a membrane and is absorbed in acidic aqueous solution containing hydrogen peroxide. The latter oxidizes nitrogen dioxide to nitrate. When a total nitrogen oxides determination is required, an oxidizing prefilter converts nitric oxide to nitrogen dioxide prior to conversion to nitrate in solution. The nitrate is determined in the laboratory with a specific ion electrode. The nitrogen dioxide or total nitrogen oxides is determined from the nitrate found with reasonably good precision and accuracy. Effects due to dosimeter orientation, liquid evaporation, and temperature were insignificant.
Dosimetry; Personal-protective-equipment; Monitoring-systems; Monitors; Nitrates; Nitrogen-compounds; Nitrogen-oxides; Analytical-methods; Analytical-instrumentation; Air-quality-measurement; Oxidation; Electrical-measurement; Measurement-instrumentation; Air-sampling; Air-analysis; Microanalysis; Air-contaminants; Air-monitoring; Chemical-reactions
10102-44-0; 10102-43-9; 7722-84-1
Issue of Publication
American Industrial Hygiene Association Journal
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division