| 农田甲烷和氧化亚氮排放自动采样观测系统 |
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| 引用本文： | 王跃思,王明星,郑循华,沈壬兴,张文,骆冬梅,龚晏邦.农田甲烷和氧化亚氮排放自动采样观测系统[J].中国科学院研究生院学报,1997(1). |
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| 作者姓名： | 王跃思 王明星 郑循华 沈壬兴 张文 骆冬梅 龚晏邦 |
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| 作者单位： | 中国科学院大气物理所，中国科学院大气物理所，中国科学院大气物理所，中国科学院大气物理所，中国科学院大气物理所，中国科学院大气物理所，中国科学院大气物理所 北京 100083，北京 100083，北京 100083，北京 100083，北京 100083，北京 100083，北京 100083 |
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| 摘 要： | 自动采样分析系统由静态采样箱、气相色谱仪、积分仪、微机、气路控制和电路控制等单元组成。主控微机通过与8749单片机通讯自动控制采样箱盖的开闭、十通阀和四通阀的换位和电磁阀的开关,完成对采样箱中气体的自动采集、输送和分析。利用软件设定适当的采样程序,采样箱中的气样可依次进入气相色谱仪,分析其中的CH_4和N_2O浓度。积分仪记录色谱数据并转存到微机中。观测系统还配有温度和辐射等传感器,用于同步测量空气、水、土壤的温度及日照强度。
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| 关 键 词： | 甲烷 氧化亚氮 自动控制 分析系统 |
Automatically Sampling and Analyzing System for Measurement of CH4/N2O Emission from Cropland |
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| Wang Yuesi Wang Mingxing Zheng Xunhua Shen Renxing Zhang Wen.Automatically Sampling and Analyzing System for Measurement of CH4/N2O Emission from Cropland[J].Journal of the Graduate School of the Chinese Academy of Sciences,1997(1). |
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| Authors: | Wang Yuesi Wang Mingxing Zheng Xunhua Shen Renxing Zhang Wen |
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| Abstract: | The automatic system for in situ measurement of N2O and CH4 emission from fields consists of static sampling chambers, a gas chromatography (GC), an integrator, a computer and gaseous and electronic controlling units. The computer controls opening and closing of chambers, switching of all valves which include one 4-port valve, one 10-port valve and many electronicmagnetic valve, sucking and trasporting air samples from chambers installed in fields, injecting samples into the GC and analyzing the CH4 and N2O concentrations, recording the objective signals with the integrator and saving the integrated data on the hard disc of the computer. With the temperature probes and radiation sensors installed in the automatic system, the temperature of air, water and soil and photosynthetically active radiation can be measured simultaneously. |
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| Keywords: | Methane Nitrous oxide automatic control analytical system |
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