Preliminary Study on Influence of Water Vapor Absorption on Measurement Precision by FTIR

Abstract

Abstract:

Absorption of Water vapor distributes in the whole mid-infrared bands, and it interferes with the quantitative analysis of infrared spectra. Impact of spectral absorption of water vapor on measurement precision is analyzed. The gas without dryness and after dryness are measured by Fourier transform infrared spectroscopy(FTIR), and the precision and detection limits of CO, CO2, N2O and CH4 are compared in the different measurements. The results show that the precision and detection limits were improved after drying of the sample gas.

Key words: Fourier transform infrared spectroscopy, measurement precision, detection limits, water vapor

CLC Number:

O657.3

Li Xiang-xian Gao Min-guang Xu Liang Wei Xiu-li Tong Jing-jing Cheng Si-yang Fen. Preliminary Study on Influence of Water Vapor Absorption on Measurement Precision by FTIR[J]. Journal of Atmospheric and Environmental Optics, 2011, 6(6): 438-442.

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Preliminary Study on Influence of Water Vapor Absorption on Measurement Precision by FTIR

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