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

C. T. Chang, C. J. Tsai, C. T. Lee, S. Y. Chang, M. T. Cheng, H. M. Chein

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

In this paper, differences between the 24-h average PM10 concentrations of Wedding β-gauge monitor and Andersen or Wedding hi-vol sampler were studied. When the deliquescent point is not exceeded, PM10 concentrations of the β-gauge are close to those of the manual samplers. The ratio of β-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 concentrations of the β-gauge compared to those of the manual sampler. The ratio of β-gauge PM10 to Andersen PM10 and Wedding PM10 is 1.21±0.22 and 1.27±0.15, respectively. However, due to evaporation of water from the aerosols collected on the filter tape of the β-gauge, differences in PM10 concentrations are much less than theoretically calculated.

Original languageEnglish
Pages (from-to)5741-5748
Number of pages8
JournalAtmospheric Environment
Volume35
Issue number33
DOIs
StatePublished - 2001

Keywords

  • β-gauge
  • PM
  • Relative humidity
  • Water content

Fingerprint

Dive into the research topics of 'Differences in PM<sub>10</sub> concentrations measured by β-gauge monitor and hi-vol sampler'. Together they form a unique fingerprint.

Cite this