| 静态箱法气相色谱法自动检测农田N2O排放 |
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| 引用本文： | 王跃思,郑循华,王明星,沈壬兴.静态箱法气相色谱法自动检测农田N2O排放[J].分析测试技术与仪器,1997,3(1):10-15. |
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| 作者姓名： | 王跃思 郑循华 王明星 沈壬兴 |
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| 作者单位： | 中国科学院大气物理所 北京 100029;中国科学院大气物理所 北京 100029;中国科学院大气物理所 北京 100029;中国科学院大气物理所 北京 100029 |
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| 摘 要： | Ｎ２Ｏ自动观测系统由微机控制电路和气路，使采样箱、气相色谱仪（ＧＣ）和积分仪自动工作，系统可连续采样分析，自动存储色谱数据，并可同时测定存储温度和辐射等气象数据，系统从放置于田间可自动开关箱盖的采样箱中，依次抽取空气样品，经除水、ＣＯ２处理后送入气相色谱仪分析Ｎ２Ｏ浓度，箱中浓度随时间的变化计算Ｎ２Ｏ的排放通量。
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| 关 键 词： | 静态箱法 一氧化二氮 气相色谱法 自动检测 |
| 收稿时间： | 1994/12/12 0:00:00 |
| 修稿时间： | 1996/10/25 0:00:00 |
Automatic System Composed of Static Chamber and Gas Chromatograph for in-situ Measurement of N2O Emission from Cropland |
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| Wang Yuesi,Zheng Xunhu,Wang Mingxing and Shen Renxing.Automatic System Composed of Static Chamber and Gas Chromatograph for in-situ Measurement of N2O Emission from Cropland[J].Analysis and Testing Technology and Instruments,1997,3(1):10-15. |
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| Authors: | Wang Yuesi Zheng Xunhu Wang Mingxing and Shen Renxing |
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| Institution: | Institute of Atmospheric Physics, the Chinese Academy of Sciences Beijing 100029;Institute of Atmospheric Physics, the Chinese Academy of Sciences Beijing 100029;Institute of Atmospheric Physics, the Chinese Academy of Sciences Beijing 100029;Institute of Atmospheric Physics, the Chinese Academy of Sciences Beijing 100029 |
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| Abstract: | A personal computer is used for the control of the electronic and pneumatic units of in-situ measurement of N2O emitted from croplands. The introduce of sample, gas chromatographic analysis and integration of the data obtained are undertaken automatically. The ambient temperature and radiation can also be measured with the automatic system. Air samples are alternatively taken from the static chamber installed in fields. After removing of raoisture and CO2, the sample is injected into GC/ECD system and the N2O concentration in the headspace of each chamber is then analyzed. The variation of N2O concentration in the headspace of each chamber can be obtained by which the N2O emission rate from the area covered by the chamber can be calculated. |
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| Keywords: | Static chamber technique N2O GC/ECD automatic oontinuous measurement |
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