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http://dx.doi.org/10.5668/JEHS.2008.34.2.148

Simultaneous NO2 and RSP Measurements Using Filtration Method  

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)
Publication Information
Journal of Environmental Health Sciences / v.34, no.2, 2008 , pp. 148-152 More about this Journal
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).
Keywords
nitrogen dioxide; respirable suspended particle; filter method;
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Times Cited By KSCI : 2  (Citation Analysis)
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