Distributions of low molecular weight dicarboxylic acids in the North Pacific aerosol samples |
| |
| Authors: | Kimitaka Kawamura Kouichi Usukura |
| |
| Institution: | (1) Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Minami-Ohsawa, Hachioji, 192-03 Tokyo, Japan |
| |
| Abstract: | Marine aerosol samples collected from the North Pacific atmosphere were studied for molecular distributions of dicarboxylic acids by using a capillary gas chromatography and mass spectrometery. A homologous series of dicarboxylic acids (C2–C10) was detected in the marine aerosol samples as dibutyl esters. All the samples showed that the smallest diacid (oxalic acid: C2) was the most abundant and comprised 41–67% of the total diacids. The second most abundant species was malonic acid (C3) or succinic acid (C4). The diacids with more carbon numbers were generally less abundant. Total diacid concentration range was 17–1040 ng m–3, which accounted for up to 1.6% of total aerosol mass. This indicates that low molecular weight dicarboxylic acids are important class of organic compounds in the marine atmosphere. The concentrations were generally higher in the western North Pacific and lower in the central North Pacific. The major portion of diacids is probably derived from the Asian Continent and East Asian countries by long-range atmospheric transport and partly fromin situ photochemical production in the marine atmosphere. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
