Journal of Atmospheric and Environmental Optics ›› 2012, Vol. 7 ›› Issue (1): 57-62.

• 论文 • Previous Articles     Next Articles

Acquisition method of high resolution spectra of ethanol vapor in near-IR range

GENG Hui, ZHANG Yu-jun, LIU Wen-qing, LIU Jian-guo, RUAN Jun, XU Zhen-yu, YAO Lu, KAN Rui-feng   

  1. Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 230031, Hefei, Anhui, China
  • Received:2011-08-31 Revised:2011-10-24 Online:2012-01-25 Published:2011-12-27

Abstract:

Ethanol is a relatively complex molecule which presents broadband absorption spectra at atmospheric pressure,its stretching overtones of OH bond is around 7000-7300 cm-1. The absorption spectrum of ethanol vapor with small amount of water vapor near 7180cm-1 was acquired by adopting tunable diode laser absorption spectroscopy (TDLAS) method, an absorption feature with HWHH of approximately 1.3cm-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.

Key words: absorption spectrum, ethanol vapor, tunable diode laser absorption spectroscopy, broadband absorption, Polynomial fitting

CLC Number: