| 北京市大气气溶胶PM2.5中水溶性有机酸的测定 |
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| 引用本文： | 黄晓锋,胡敏,何凌燕.北京市大气气溶胶PM2.5中水溶性有机酸的测定[J].环境科学,2004,25(5):21-25. |
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| 作者姓名： | 黄晓锋 胡敏 何凌燕 |
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| 作者单位： | 北京大学环境学院环境模拟与污染控制国家联合重点实验室,北京,100871 |
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| 基金项目： | 国家自然科学基金资助项目(20131160731,20177002,30230310);国家重点基础研究发展规划(973)项目(2002CB211605) |
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| 摘 要： | 采用毛细管电泳的方法对北京大气PM2.5中低分子量二元羧酸、醛酸、酮酸和甲磺酸等10种水溶性有机酸进行了测定.方法的定量检测限为110～280 μg/L(提取液),峰面积的相对标准偏差为1.7%～6.0%,标准工作曲线的线性相关系数为0.995～0.999.北京夏、秋、冬3季10种有机酸的总量平均分别为721ng/m3、362ng/m3、325 ng/m3,浓度水平总体上与国外大城市相当.其中乙二酸的含量最为丰富.通过各种有机酸浓度的季节变化规律,简要地探讨了它们的来源特征.
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| 关 键 词： | PM2.5 水溶性有机酸 毛细管电泳 来源特征 |
| 文章编号： | 0250-3301(2004)05-0021-05 |
| 收稿时间： | 2003/10/31 0:00:00 |
| 修稿时间： | 2004/2/13 0:00:00 |
Determination of Water Soluble Organic Acids in PM2.5 of Atmosphere in Beijing City |
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| HUANG Xiao feng,HU Min and HE Ling yan.Determination of Water Soluble Organic Acids in PM2.5 of Atmosphere in Beijing City[J].Chinese Journal of Environmental Science,2004,25(5):21-25. |
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| Authors: | HUANG Xiao feng HU Min and HE Ling yan |
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| Institution: | State Key Joint Laboratory of Environment Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871, China. |
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| Abstract: | Ten water soluble organic acids in PM2.5 of atmosphere in Beijing were determined by capillary electrophoresis, including low molecular weight dicarboxylic acids, aldehyde acids, ketoacids and methanesulfonic acid. The quantified detection limits ranged from 110 to 280 microg/L (extract). The precise of peak area was between 1.7% and 6.0%, and the correlation coefficients of standard curve were 0.995-0.999. The average total concentrations of the ten organic acids in summer, fall and winter were 721 ng/m3, 362 ng/m3 and 325 ng/m3, respectively, which were comparable with some foreign big cities. Oxalic acid was the most abundant species. By exploring seasonal variations of the acids, their source characteristics were simply discussed. |
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| Keywords: | PM2 5 water soluble organic acids capillary electrophoresis source characteristics |
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