Differences in PM10 concentrations measured by beta-gauge monitor and hi-vol sampler

Citation
Ct. Chang et al., Differences in PM10 concentrations measured by beta-gauge monitor and hi-vol sampler, ATMOS ENVIR, 35(33), 2001, pp. 5741-5748
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology,"Earth Sciences
Journal title
ATMOSPHERIC ENVIRONMENT
ISSN journal
1352-2310 → ACNP
Volume
35
Issue
33
Year of publication
2001
Pages
5741 - 5748
Database
ISI
SICI code
1352-2310(200111)35:33<5741:DIPCMB>2.0.ZU;2-#
Abstract
In this paper. differences between the 24-h average PM10 concentrations of Wedding beta -gauge monitor and Andersen or Wedding hi-vol sampler were stu died. When the deliquescent point is not exceeded, PM10 concentrations of t he beta -gauge are close to those of the manual samplers. The ratio of beta -gauge PM10 to Andersen PM10 and Wedding PM10 is 1.08 +/-0.06 and 1.09 +/- 0.12, respectively. However, when the deliquescent point is exceeded, water absorption by the inorganics of aerosols leads to higher PM10 concentratio ns of the beta -gauge compared to those of the manual sampler. The ratio of beta -gauge PM10 to Andersen PM10 and Wedding PM10 is 1.21 +/-0.22 and 1.2 7 +/-0.15, respectively. However., due to evaporation of water from the aer osols collected on the filter tape of the beta -gauge, differences in PM10 concentrations are much less than theoretically calculated. (C) 2001 Elsevi er Science Ltd. All rights reserved.