Journal of Environmental Health Sciences (한국환경보건학회지)

Korean Society of Environmental Health (한국환경보건학회)
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Simultaneous NO2 and RSP Measurements Using Filtration Method

필터방식을 이용한 이산화질소 및 호흡성 분진의 동시 측정

  • Yang, Won-Ho (Department of Occupational Health, Catholic University of Daegu) ;
  • Im, Sung-Kuk (Department of Occupational Health, Catholic University of Daegu) ;
  • Kim, Moon-Hyeon (Department of Environmental Engineering, Daegu University)
  • 양원호 (대구가톨릭대학교 산업보건학과) ;
  • 임성국 (대구가톨릭대학교 산업보건학과) ;
  • 김문현 (대구대학교 환경공학과)
  • Published : 2008.04.30
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Abstract

Coated filters were developed to replace the glass impinger methods that use reagent solutions. The purpose of this study was to simultaneously measure nitrogen dioxide ($NO_2$) and respirable suspended particles (RSP) by a filtration method with a cyclone connected to a pump. A first pre-filter for RSP and second filter for $NO_2$, which was soaked in a TEA (Triethanolamine) solution, were loaded into a filter cassette with a pump flow rate of 1.7 l/m. After sampling, the TEA soaked filter was removed from the cassette, placed in a large test tube (10 ml), mixed, and allowed time to develop. The absorbance (abs) of the diazo compound of the $NO_2$ and N-(1-Napthylethylenediamine dihydrochloride) in the color reagent was measured at 545 nm on a spectrophotometer. The collection efficiency(%) of $NO_2$ by each 3 filter soaked in TEA solution and used in the cyclone with a pump flow rate 1.7 l/m was $89{\pm}3%$ and the correlation coefficient between the true $NO_2$ concentration and that determined by the TEA soaked filters was 0.993(p<0.001).

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References

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