Validation of a diffusive sampler for NO2
1999 (English)In: Journal of Environmental Monitoring, ISSN 1464-0325, E-ISSN 1464-0333, Vol. 1, 349-352 p.Article in journal (Refereed) Published
A diffusive sampler for NO2, Willems badge, was validated in laboratory experiments and field tests. The collecting reagent for NO2 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 NO2 concentration or relative humidity on sampling rate, and the influence of sampling time was found to be small. The detection limit was 4 mg m−3 for a 24 h
sample. The capacity is high enough to allow sampling of 150 mg 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 performedwell, 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.
Place, publisher, year, edition, pages
Royal Society of Chemistry, 1999. Vol. 1, 349-352 p.
diffusive sampler, NO2, validation
Environmental Health and Occupational Health Chemical Sciences
Research subject Analytical Chemistry
IdentifiersURN: urn:nbn:se:umu:diva-95729DOI: 10.1039/A902937KISI: 000083696300017OAI: oai:DiVA.org:umu-95729DiVA: diva2:760909
AIRMON, 1999, Geilo, Norway