Ethanol vapor measurement based on tunable diode laser absorption spectroscopy

Author:

Geng Hui ,Liu Jian-Guo ,Zhang Yu-Jun ,Kan Rui-Feng ,Xu Zhen-Yu ,Yao Lu ,Ruan Jun ,

Abstract

A method of detecting ethanol vapor concentration using a narrow bandwidth tunable diode laser is studied. The relatively narrow absorption feature in the vicinity of 7180 cm-1 is used as an identification of ethanol vapor. To eliminate the interference of water vapor, multidimensional linear regression analysis is used to solve the problem of multiple molecule absorptions. The detection limit is obtained to be 25 ppm·m experimentally.

Publisher

Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences

Subject

General Physics and Astronomy

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