Journal of Atmospheric and Environmental Optics, Volume. 7, Issue 1, 57(2012)
Acquisition Method of High Resolution Spectra of Ethanol Vapor in Near-IR Range
Ethanol is a relatively complex molecule which presents broadband absorption spectra at atmospheric pressure,its stretching overtones of OH bond is around 70007300 cm-1. The absorption spectrum of ethanol vapor with small amount of water vapor near 7180 cm-1 was acquired by adopting tunable diode laser absorption spectroscopy (TDLAS) method, an absorption feature with HWHH of approximately 1.3 cm-1 was obtained by eliminating the interference of water vapor with polynomial fitting. Study on the line-types of absorption spectra of ethanol vapor with different concentrations demonstrates that line-types have no dependence on partial pressure. This work laid the foundation for the research of ethanol remote sensing based on TDLAS.
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GENG Hui, ZHANG Yu-jun, LIU Wen-qing, LIU Jian-guo, RUAN Jun, XU Zhen-yu, YAO Lu, KAN Rui-feng. Acquisition Method of High Resolution Spectra of Ethanol Vapor in Near-IR Range[J]. Journal of Atmospheric and Environmental Optics, 2012, 7(1): 57
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Received: Aug. 31, 2011
Accepted: --
Published Online: Jan. 16, 2012
The Author Email: Hui GENG (genghui@aiofm.ac.cn)