Open AccessThe tunable diode laser absorption spectroscoty for measurement of NH3 with particles
Author(s) -
Wang Fei,
Qunxing Huang,
Ning Li,
Jun Yan,
Yong Chi,
Kefa Cen
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.3867
Subject(s) - tunable diode laser absorption spectroscopy , materials science , absorption (acoustics) , laser , diode , signal (programming language) , wavelength , modulation (music) , optics , absorption spectroscopy , spectroscopy , laser diode , optoelectronics , tunable laser , physics , quantum mechanics , computer science , acoustics , composite material , programming language
Tunable diode laser absorption spectroscopy (TDLAS) with wavelength modulation is used to measure the NH3 concentration at normal temperature and pressure near 1531.7nm in near-infrared region. The concentration of 25ppm can be obtained by 10m long-path celland concentration from 25ppm to 400ppm has good linear relationship with 2f signal. The effect of particles on 2f signal is discussed in this paperand a solution of the problem using laser intensity linear fit to make the concentration measurement immune to particle disturbance is suggested.