Study on the Chemical Character of Water Soluble Organic Compounds in Fine Atmospheric Aerosol at the Jungfraujoch

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• 作者：Zolt¨¢n Kriv¨¢csy ; Andr¨¢s Gelencs¨¦r ; Gyula Kiss ; Ern? M¨¦sz¨¢ros ; ¨¢gnes Moln¨¢r ; Andr¨¢s Hoffer ; Tam¨¢s M¨¦sz¨¢ros ; Zsolt S¨¢rv¨¢ri ; D¨®ra Temesi and B¨¢lint Varga ; et al.
• 关键词：high ; alpine site ; atmospheric aerosol ; water soluble organic substances ; group separation ; acidity
• 刊名：Journal of Atmospheric Chemistry
• 出版年：2001
• 出版时间：2001
• 年：2001
• 卷：39
• 期：3
• 页码：235-259
• 全文大小：206 KB

文摘

In this study the chemical nature of the bulk of water soluble organic compounds in fine atmospheric aerosol collected during summer 1998 at the Jungfraujoch, Switzerland (3580 m asl) is characterised. The mass concentration of water soluble organic substances was similar to those of major inorganic ions, and the water soluble organic matter was found to be composed of two main fractions: (i) highly polyconjugated, acidic compounds with a varying degree of hydrophobicity and (ii) slightly polyconjugated, neutral and very hydrophilic compounds. The contribution of both fractions to the total water soluble organic carbon was about 50 % . Separation into individual components was impossible either by HPLC or capillary electrophoresis which indicates the presence of a high number of chemically similar but not identical species. Results obtained by ultrafiltration and HPLC-MS have shown that the molecular weights are of the order of several hundreds. Most of the protonation constants for the acidic compounds determined by capillary electrophoresis were in the range 104–107.