| 大气中氯氟烃类物质浓度变化的研究 |
| 摘要点击 776 全文点击 2118 投稿时间：1998-06-08 |
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| 中文关键词 氯氟烃 气相色谱法 大气化学 大气监测 |
| 英文关键词 CFCs Gas Chromatography atmospheric determination atmospheric chemistry |
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| 中文摘要 |
| 通过低温脱水和低温浓缩(-196℃),建立了用气相色谱(ECD检测器)测定大气中超痕量氯氟烃类物质(CECs)的分析方法。对上海市清洁大气中CFCs本底浓度进行了监测,并与日本东京大学的数据进行了比较。结果表明,1997年以来,上海市郊大气中CFC-11和CFC-12浓度均呈下降趋势。上海CFCs排放量与发达国家相比仍处于较低的水平。 |
| 英文摘要 |
| The method of detecting atmospheric CFCs using gas chromatograph(ECD detector) was established.Through the procedure,the method of cryogenic dehydration and concentrating was introduced.The CFCs concentration of Shanghai clean air was detected and was compared with that of The University of Tokyo,Japan.The result shows that,since 1997,the atmospheric concentrations of CFC-11 and CFC-12 have decreased.Shanghai's emission of CFCs is in a low level compared with the developed countries. |
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