한국대기환경학회지 (Journal of Korean Society for Atmospheric Environment)

  • 제27권1호
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  • Pages.63-72
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  • 2011
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  • 1598-7132(pISSN)
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  • 2383-5346(eISSN)
한국대기환경학회 (Korean Society for Atmospheric Environment)
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여과지를 이용한 유기탄소의 측정 오차 보정

Filter-based Correction for Positive Sampling Artifacts in the Determination of Ambient Organic Carbon

  • 강병욱 (충주대학교 환경공학부) ;
  • 연익준 (충주대학교 환경공학부) ;
  • 조병렬 (충주대학교 환경공학부) ;
  • 박상찬 (충주대학교 환경공학부) ;
  • 이학성 (서원대학교 환경건설정보학과,) ;
  • 전준민 (순천제일대학 그린전남환경종합센터) ;
  • 나광삼 (캘리포니아 환경부 대기자원국)
  • Kang, Byung-Wook (Division of Environmental Engineering, Chungju National University) ;
  • Yeon, Ik-Jun (Division of Environmental Engineering, Chungju National University) ;
  • Cho, Byung-Yeol (Division of Environmental Engineering, Chungju National University) ;
  • Park, Sang-Chan (Division of Environmental Engineering, Chungju National University) ;
  • Lee, Hak-Sung (Department of Environmental, Civil and Information System, Seowon University) ;
  • Jeon, Jun-Min (Green Jeonnam Environmental Complex Center, Suncheon First College) ;
  • Na, Kwang-Sam (California Air Resources Board, California Environmental Protection Agency)
  • 투고 : 2010.08.12
  • 심사 : 2010.12.21
  • 발행 : 2011.02.28
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초록

This study describes the impact of positive sampling artifact caused by a filter-based sampling in the determination of ambient organic carbon (OC). Three different sampling media combinations were employed for this investigation: (1) Quartz filter-alone (Q-alone), (2) quartz filter behind quartz-fiber filter (QBQ), and (3) quartz filter and quartz filter behind Teflon filter (Q-QBT). The measurement of ambient OC was carried out at a semi-urban site near oceanside at the end of November of 2008. It was found that Q-alone sampling configuration resulted in a higher OC than QBQ and Q-QBT by 14% and 28%, respectively due to no correction for positive artifact caused by adsorption of gas-phase OC onto the filter. A lower quantity of OC was collected from the backup quartz filter on QBQ than that from Q-QBT. A possible explanation is that the front quartz filter of QBQ was not fully saturated with gas-phase OC during the sampling period, allowing smaller amount of gas-phase OC to reach the backup quartz filter. The contribution of positive artifact to $PM_{2.5}$ mass was approximately 2.15 ${\mu}g/m^3$ which is equivalent to 6% in terms of Q-QBT sampling configuration. The positive artifact was found to be more dominated during summer than during winter, showing temperature dependence. It was concluded that Q-QBT sampling configuration offers less impact of positive artifact on ambient OC sampling than QBQ in quantification of OC.

키워드

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