Fourier transform infrared greenhouse analyzer for gases and carbon isotope ratio

LI Xiang-xian; XU Liang; GAO Min-guang; TONG Jing-jing; LIU Jian-guo

doi:10.3788/OPE.20142209.2359

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Fourier transform infrared greenhouse analyzer for gases and carbon isotope ratio

更新时间：2020-08-13

- Fourier transform infrared greenhouse analyzer for gases and carbon isotope ratio
- Optics and Precision Engineering Vol. 22, Issue 9, Pages: 2359-2368(2014)
- 作者机构：
  
  1. 国家环境保护环境光学监测技术重点实验室,安徽合肥,230031
  2. 中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室,安徽合肥,230031
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20142209.2359
  CLC： X851
- Received：05 November 2013，
  
  Revised：31 December 2013，
  
  Published：25 September 2014
- 稿件说明：
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李相贤, 徐亮, 高闽光等. 分析温室气体及CO<sub>2</sub>碳同位素比值的傅里叶变换红外光谱仪[J]. 光学精密工程, 2014,22(9): 2359-2368

LI Xiang-xian, XU Liang, GAO Min-guang etc. Fourier transform infrared greenhouse analyzer for gases and carbon isotope ratio[J]. Editorial Office of Optics and Precision Engineering, 2014,22(9): 2359-2368
李相贤, 徐亮, 高闽光等. 分析温室气体及CO<sub>2</sub>碳同位素比值的傅里叶变换红外光谱仪[J]. 光学精密工程, 2014,22(9): 2359-2368 DOI： 10.3788/OPE.20142209.2359.

LI Xiang-xian, XU Liang, GAO Min-guang etc. Fourier transform infrared greenhouse analyzer for gases and carbon isotope ratio[J]. Editorial Office of Optics and Precision Engineering, 2014,22(9): 2359-2368 DOI： 10.3788/OPE.20142209.2359.

摘要

改进了傅里叶变换红外分析仪（FTIR）的硬件设计以实现温室气体及CO

碳同位素比值的多组分、高精度、连续自动测量。首先，对FTIR分析仪测量系统进行了设计和理论分析，引入了温度和压力监控系统以及全密封气路干燥系统。然后，讨论了光谱的定量分析过程。最后，设计了标准气体对比测量实验。实验结果表明：分析仪测量CH

，CO，CO

和

值的标准偏差分别为0.0110

-6

，0.01110

-6

，0.23910

-6

和0.572，与常规FTIR测量系统相比，其检测的标准不确定度分别提高了6.3，8.45，10.54和14.73倍，其系统误差分别提高了2.88，1.93，4.67和4.66倍；对比分析仪与同位素质谱仪对

值的测量结果，标准偏差分别为0.572和0.171，二者测量的标准不确定度相近。所设计的温室气体及CO

碳同位素比值FTIR分析仪能够满足多组分、高精度、连续自动测量的需要。

Abstract

The hardware design of a Fourier Transform Infrared (FTIR) analyzer was improved to realize the simultaneous and continuous measurements of greenhouse gases and

values in high Precision. Firstly

the FTIR measurement system was designed and analyzed theoretically

and the temperature and pressure monitoring systems and sealed drying gas circuit were introduced into the spectroscopy. Then the process of quantitative spectral analysis was presented. Finally

the comparative measurements were designed by using standard gases. Experimental results on CH

and

indicate that the Standard Deviations(STD) measured by the designed analyzer are 0.01

0.011

0.239 10

-6

and 0.572

the standard uncertainty of designed measurement system is improved about 6.3

8.45

10.54 and 14.73 times that of routine FTIR measurements

and the system errors are improved about 2.88

1.93

4.67 and 4.66 times

respectively. The comparison of the measurement results between the analyzer and the Isotope Ratio Mass Spectrometer (IRMS) for

value shows that the STDs are 0.572 and 0.171 respectively

and the standard uncertainty of the both methods is similar. The FTIR analyzer for greenhouse gases and carbon isotope ratios satisfies the requirements of measurements for multi-species

online and high precision.

关键词

Keywords

references

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