대기 중 이산화질소 측정을 위한 튜브형 및 뱃지형 패시브샘플러의 성능 비교

Performance evaluation of tube and badge type of passive air sampler for measuring nitrogen dioxide in ambient air

The purpose of this study is to evaluate the performance of a tube and badge type NO₂ passive air sampler. The principle of the method is a colorimetric reaction of NO₂ with N-1-naphthylethylendiamine under acidic conditions. The sampling rates for the tube and badge type passive air samplers was determined 12.3 ± 4.4 mL/min and 27.3 ± 4.9 mL/min, respectively, as obtained from the slope of the linear correlation between the NO₂ mass collected by the passive air sampler and the NO₂ concentration with the NO₂ analyzer. The tube and badge type passive air sampler were moderately correlated with a correlation coefficient of 0.9112. The measurement for the precision and accuracy of the passive air sampling was carried out with duplicate measurement of passive air samplers. The passive air sampler had good precision and accuracy for measuring NO₂ in atmosphere. A good correlation was observed between the passive air sampler and the NO₂ analyzer with a coefficient of determination of 0.9153 (tube type) and 0.9514 (badge type). This passive air sampler would be suitable for the NO₂ concentration monitoring in atmosphere.