| 摘要: |
| 二甲基硫(CH3SCH3, 或DMS)是大气硫化物最主要的天然来源之一, 是由海洋浮游植物产生的。其在大气中的氧化产物甲磺酸(MSA)和非海盐硫酸盐(Nss-SO42-)是沿海天然降水中酸性物质的主要贡献者。对大气气溶胶中甲磺酸的采样条件及测定方法进行了探讨, 利用离子色谱技术测定了青岛春季大气气溶胶中甲磺酸质量浓度平均为0.376 μg/m3, 并与文献结果进行了比较。 |
| 关键词: 甲磺酸 离子色谱 二甲基硫 气溶胶 |
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| 基金项目:国家杰出青年科学基金项目(40525017); 国家自然科学基金项目(40476034); 国家自然科学基金重大项目(40490265); 山东省“泰山学者”建设工程专项经费资助 |
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| Analysis of methanesulfonic acid in the atmospheric aerosols at Qingdao |
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| Abstract: |
| Dimethylsulfide (DMS) is a predominant volatile sulfur compound produced by the marine phytoplankton. When released into the atmosphere, dimethylsulfide is oxidized by hydroxyl and NO3 radical to form various sulfur-containing products, such as non-sea-salt sulfate (Nss-SO42-) and methanesulfonic acid (MSA). In marine boundary layer, MSA and nss-SO42- are the main contributors to the natural acidity of precipitation. The sampling conditions and the measuring methods for MSA were screened and chosen. Atmospheric aerosols in spring Qingdao was quantitatively determined by ion chromatography. The concentrations of MSA varied from 0.016 to 0.074 μg/m3 with an average of 0.0376 μg/m3. The concentration of MSA was compared with those measured in other areas. |
| Key words: methanesulfonic acid ion chromatography dimethylsulfide aerosol |
