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자료유형
학술저널
저자정보
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한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제22권 제1호
발행연도
2006.2
수록면
63 - 71 (9page)

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An automated carbonyl measurement system was constructed. Atmospheric carbonyl compounds were extracted onto DNPH containing collection solution while flowing through a glass coil. Each carbonyl species was separated on a HPLC column and quantified by UV absorption detector. Using this system, carbonyl compounds were continuously measured at the campus of Korea University in Seoul, Korea during June, 2005. Sampling resolution was 30 minutes and the detection limit of HCHO was 0.19 ppbv. Also, O₃, it’s precursors, and meteorological parameters were measured.
The maximum, minimum, average, and median concentrations of HCHO during the whole experiment was 35.8 ppbv, 1.4 ppbv, 11.7 ppbv, and 9.3 ppbv respectively. Formaldehyde showed a distinct diurnal variation with a broad maximum around 13~15, which was 1~3 hours ahead of an ozone maximum. During a couple of days, however, HCHO concentrations were kept high through the night or increased concomitantly with NOx in the morning. These results imply that HCHO was mainly produced from the photochemical oxidation of VOCs, but local emission sources couldn’t be ruled out.
The differences between daily maximum and minimum of O₃ and HCHO were calculated for 11 days of June, when typical diurnal variations were observed for the two species. A strong positive correlation was found between ΔO₃ and ΔHCHO and the average mole ratio of ΔHCHO to ΔO₃ was 2.6. It indicates that formaldehyde played a key role in O₃ production as an indicator species in Metropolitan Seoul during June, 2005.

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Abstract

1. 서론

2. 실험 방법

3. 결과 및 고찰

4. 결론

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