Gaseous formic and acetic acids in the atmosphere of Yokohama, Japan

Autor: T. Morikami, J. J. Schultz Tokos, H. Shigetani, Shigeru Tanaka, Y. Hashimoto
Rok vydání: 1992
Předmět:
Zdroj: Journal of Atmospheric Chemistry. 14:85-94
ISSN: 1573-0662
0167-7764
DOI: 10.1007/bf00115225
Popis: Gaseous formic acid (HCOOHg) and acetic acid (CH3COOHg) were measured every 30 minutes during a 10 hour daylight period in August, and a 24 hour period in October, 1990 in the urban atmosphere of Yokohama, Japan. An aqueous nebulizer sampler and ion-chromatography exclusion (ICE) were used for the measurements. In the August experiment (0800–1800 local time) the mean HCOOHg concentration was found to be 7.3±2.5 ppbv. The mean CH3COOHg concentration was 3.8±1.2 ppbv. In the 24 hour experiment in October, concentrations of both acids were lower between 0800–1800 than during the same time-period in August (mean HCOOHg=4.4±2.7 ppbv, mean CH3COOHg=1.4±0.5 ppbv). In October, concentrations of both acids were higher in daylight hours than at night; sporadic high HCOOHg concentrations were observed. In both experiments the ratio HCOOHg/CH3COOHg of individual samples was usually ≥2.0 (mean ratio of 2.0 in August, 3.1 in October).
Databáze: OpenAIRE
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