| 超临界流体萃取对大气飘尘中有机污染物的分析 |
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| 引用本文： | 游静,陈淑莲,王国俊. 超临界流体萃取对大气飘尘中有机污染物的分析[J]. 分析测试技术与仪器, 1999, 5(2): 89-93 |
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| 作者姓名： | 游静 陈淑莲 王国俊 |
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| 作者单位： | 中国科学院兰州化学物理研究所 |
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| 摘 要： | 采用超临界流体萃取与气相色谱／质谱联用技术对兰州市大气飘尘中有机污染物进行了测定。实验考察了对强致癌性化合物多环芳烃类萃取的最佳条件，在２６．０ＭＰａ，８０℃下，０．５ｍＬ甲醇做改性剂，用ＣＯ２作为超临界萃取介质，静态萃取１０ｍｉｎ后再以０．５ｍＬ／ｍｉｎ的流速动态萃取３０ｍｉｎ，对实际样品进行了定性定量分析，共检测出６９种有机污染物，该方法简便，快速，适合于飘尘中有机污染物的测定。
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| 关 键 词： | 超临界流体萃取 飘尘 有机污染物 二氧化碳 测定 |
| 收稿时间： | 1998-10-14 |
| 修稿时间： | 1998-11-16 |
Analysis of Organic Pollutants in Dust by Supercritical Fluid Extraction |
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| YOU Jing,CHEN Shulian and WANG Guojun. Analysis of Organic Pollutants in Dust by Supercritical Fluid Extraction[J]. Analysis and Testing Technology and Instruments, 1999, 5(2): 89-93 |
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| Authors: | YOU Jing CHEN Shulian WANG Guojun |
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| Affiliation: | Lanzhou Institute of Chemical Physics, the Chinese Academy of Sciences, Lanzhou 730000;Lanzhou Institute of Chemical Physics, the Chinese Academy of Sciences, Lanzhou 730000;Lanzhou Institute of Chemical Physics, the Chinese Academy of Sciences, Lanzhou 730000 |
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| Abstract: | Methods of Supercritical Fluid Extraction (SFE) have been used for concentrating organic pollutants in the atmospheric dust. Four factors (extraction pressure, temperature, time and modifier) were studied for the effects on SFE, the conditions selected were 26.0 MPa,80 ,0.5 mL methanol as modifier and 30 min of extraction time. Finally, the extracts were injected into a capillary GC/MS without further concentration. In this manner, 69 organic pollutants including 15 PAHs were detected in the Lanzhou city atmospheric dust. The concentration of benzo pyrene in this analysis also compared to that of other experiments all over the world. The study shows the proposed method is simple and timesparing and it is suitable to the analysis of the organic pollutants in dust. |
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| Keywords: | Supercritical Fluid Extraction Dust Organic Pollutants Supercritical carbon dioxide |
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