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Issue 4, 1999
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Validation of a diffusive sampler for NO2

Abstract

A diffusive sampler for NO 2 , Willems badge, was validated in laboratory experiments and field tests. The collecting reagent for NO 2 in the sampler is triethanolamine, and the analysis is based on a modified colorimetric method, the Saltzman method. The analysis was performed by a flow injection analysis (FIA) technique. The sampling rate for the sampler was determined to be 40.0 ml min –1 . There was no effect of NO 2 concentration or relative humidity on sampling rate, and the influence of sampling time was found to be small. The detection limit was 4 µg m –3 for a 24 h sample. The capacity is high enough to allow sampling of 150 µg m –3 for 7 days, which is twice the recommended Swedish short-term (24 h) guideline value as a 98-percentile over 6 months. In field tests, the sampler performed well, even at wind speeds higher than 2 m s –1 , and at low temperatures. The overall uncertainty of the method was 24%. The sensitivity and capacity of the method also make it suitable for personal sampling for 2-8 h in working environments.

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Article information


J. Environ. Monit., 1999,1, 349-352
Article type
Paper

Validation of a diffusive sampler for NO2

A. Hagenbjörk-Gustafsson, R. Lindahl, J. Levin and D. Karlsson, J. Environ. Monit., 1999, 1, 349 DOI: 10.1039/A902937K

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