LI-840A CO2/H2O气体分析仪的恒温改进及校标方法
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南京信息工程大学大气环境中心,南京信息工程大学大气环境中心,南京信息工程大学大气环境中心,南京信息工程大学大气环境中心,南京信息工程大学大气环境中心,南京信息工程大学大气环境中心

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P49

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教育部长江学者和创新团队发展计划、江苏高校优势学科建设工程(PAPD)项目


The constant temperature improvement and calibration method of LI-840A CO2/H2O gas analyzer
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Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science and Technology,Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science and Technology,Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science and Technology,Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science and Technology,Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science and Technology

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    摘要:

    针对测量精度受温度变化影响较大的不足,对LI-840A CO2/H2O气体分析仪进行了恒温控制改进,并在效果检验和仪器性能测试的基础上,提出了进一步改进观测方法的建议。结果表明:(1)自制恒温箱的温度控制范围为1-45℃,控温精度可达到±0.1℃。(2)恒温控制改进后,LI-840A与Picarro G1101-I气体分析仪的CO2浓度观测结果均十分接近且变化趋势一致,结合每天一次的校准频率,可以保证LI-840A的CO2浓度观测偏差控制在2μmol.mol-1以内,并实际观测中得到了验证。

    Abstract:

    The LI-840A CO2/H2O gas analyzer had been improved in the aspect of constant temperature control since the measuring accuracy of LI-840A gas analyzer was greatly influenced by the fluctuation of temperature. In addition, some suggestions on further improvement of observational methods had also been put forward on the basis of improved constant temperature control test and instrument performance test. Results showed that: (1) the temperature range of self-made incubator can be controlled from 1 to 45 ℃ with a precision of ± 0.1 ℃. (2) after the modification of the constant temperature control both the observed CO2 and H2O concentration of LI-840A and Picarro G1101-I analyzer were well closed to each other. Calibration of CO2 concentration with the frequency of once a day can make the observational error of CO2 concentration within 2μmol.mol-1 and this had been validated in the urban CO2 concentration observation.

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李汉超,刘寿东,邓力琛,等. LI-840A CO2/H2O气体分析仪的恒温改进及校标方法[J]. 科学技术与工程, 2014, 14(20): .
LI Han-chao, LIU Shou-dong, DENG Li-chen, et al. The constant temperature improvement and calibration method of LI-840A CO2/H2O gas analyzer[J]. Science Technology and Engineering,2014,14(20).

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历史
  • 收稿日期:2014-02-21
  • 最后修改日期:2014-03-18
  • 录用日期:2014-03-28
  • 在线发布日期: 2014-07-18
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