Comparison of active and diffusive sampling methods for environmental monitoring of styrene
article
Measurement of occupational exposure to styrene in industry showed that concentrations measured with the diffusive sampler 3M-3500 Organic Vapor Monitor were about 30 percent lower than those obtained with SKC Jumbo charcoal tubes. Samples were taken simultaneously: 99 paired personal samples and 66 paired stationary samples. The results showed a good correlation between the two samplers. Spearman rank correlation coefficients for the personal and stationary samples were 0.95 and 0.97, respectively. In a laboratory study, the desorption efficiencies of both samplers and the uptake rate of the 3M-3500 Organic Vapor Monitor were measured. The desorption efficiencies were close to the expected values. The uptake rate of the 3M-3500 Organic Vapor Monitor (93 ng/ppm°min), however, appeared to be considerably lower than the value supplied by the manufacturer (114 ng/ppm°min). All values of the field study were corrected by a factor of 1.2 in order to account for the low uptake rate. The 3M-3500 Organic Vapor Monitor appeared to be a useful alternative for the active sampling method with the SKC jumbo tube in the case of large scale studies. However, the uptake rate of such a monitor should be verified beforehand because of possible deviations of more than 15 percent from the value supplied by the manufacturer.
Topics
TNO Identifier
231085
ISSN
1047322X
Source
Applied Occupational and Environmental Hygiene, 5(6), pp. 364-369.
Pages
364-369
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