Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Correction Factors for Outdoor Concentrations of PM2.5 Measured with Portable Real-time Monitors Compared with Gravimetric Methods: Results from South Korea

  • Yun, Dong-Min (Department of Environmental Health Sciences, Soonchunhyang University) ;
  • Kim, Myeong-Bok (APM Engineering) ;
  • Lee, Jun-Bok (Seoul Metropolitan Government Research Institute of Public Health and Environment) ;
  • Kim, Bo-Kyeong (Department of Environmental Health Sciences, Soonchunhyang University) ;
  • Lee, Dong-Jae (Department of Environmental Health Sciences, Soonchunhyang University) ;
  • Lee, Seon-Yeub (Department of Environmental Health Sciences, Soonchunhyang University) ;
  • Yu, Sol (APM Engineering) ;
  • Kim, Sung-Roul (Department of Environmental Health Sciences, Soonchunhyang University)
  • Received : 2015.08.11
  • Accepted : 2015.11.10
  • Published : 2015.12.29
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Abstract

This study investigated the association between $PM_{2.5}$ concentrations obtained with portable real-time monitors and those obtained with gravimetric methods in national urban air-quality monitoring sites in Seoul, South Korea. We used the SidePak AM510 Personal Aerosol Monitor (TSI Inc., 500 Cardigan Road Shoreview, MN) and DustTrak DRX 8533 (TSI Inc., 500 Cardigan Road Shoreview, MN) as portable real-time monitors for measuring $PM_{2.5}$ concentrations and compared these values with those measured with the PMS-103 or SEQ 47/50 models operated by Federal Reference Method (FRM) or the European Committee for Standardization(ECS), respectively, in national urban air-quality monitoring sites in Seoul. Measurements were conducted every other day in the winter and spring seasons of 2014. The estimated daily mean concentrations of $PM_{2.5}$ ranged between 13.4 and $161.9{\mu}g/m^3$ using AM 510 and between 22.0 and $156.0{\mu}g/m^3$ using DustTrak. The Spearman correlation coefficient for $PM_{2.5}$ concentrations between AM 510 and gravimetric results was 0.99, and the correlation between DustTrak and gravimetric results was 0.87. The correction factor suggested was 0.42 and 0.29 for AM 510 and DustTrak, respectively. We found that $PM_{2.5}$ concentrations measured with real-time monitors could overestimate true $PM_{2.5}$ concentrations and therefore the application of a correction factor (0.43) is strongly suggested for quantification when Real-time monitors were operated of $PM_{2.5}$ levels at urban atmospheric environment of South Korea.

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