Validation of the Willems badge diffusive sampler for nitrogen dioxide determinations in occupational environments
2002 (English)In: The Analyst, ISSN 0003-2654, E-ISSN 1364-5528, Vol. 127, no 1, 163-168 p.Article in journal (Refereed) Published
The Willems badge, a diffusive sampler for nitrogen dioxide, has previously been validated for ambient air measurements. This paper describes the laboratory and field validation of the Willems badge for personal sampling under working environment conditions. The mean sampling rate in the laboratory tests was 46 ml min(-1), with an RSD of 12%. No statistically significant effects on sampling rate of the sampling time, concentration of NO2 or relative humidity were found. A slightly decreased sampling rate was observed at low wind velocity. This was also confirmed during static sampling, which makes the sampler less appropriate for static sampling indoors. No back diffusion was observed. Storage of the samplers for two weeks before or after exposure did not affect the sampling rate. Our analysis is based on a modified colorimetric method, performed by FIA (flow injection analysis). This technique was compared to ion chromatography analysis. The use of ion chromatography lowered the detection limit from 11 to 2 microg m(-3) for an 8 h sample, and furthermore enabled the detection of other anions. In conclusion, the diffusive sampler was found to perform well for personal measurements in industrial environments.
Place, publisher, year, edition, pages
Royal Society of Chemistry, 2002. Vol. 127, no 1, 163-168 p.
Chemical Sciences Environmental Health and Occupational Health
IdentifiersURN: urn:nbn:se:umu:diva-83469DOI: 10.1039/b107844eISI: 000173475200033PubMedID: 11827385OAI: oai:DiVA.org:umu-83469DiVA: diva2:667419