Open AccessAbsorption measurements of ambient methane with tunable diode laser
Author(s) -
Ruifeng Kan,
Wenqing Liu,
Yujun Zhang,
Jianguo Liu,
Fengzhong Dong,
Gao Shan-Hu,
Min Wang,
Jun Chen
Publication year - 2005
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.54.1927
Subject(s) - tunable diode laser absorption spectroscopy , materials science , methane , absorption (acoustics) , diode , laser , sensitivity (control systems) , absorption spectroscopy , trace gas , optics , optoelectronics , atmosphere (unit) , spectroscopy , detection limit , tunable laser , analytical chemistry (journal) , physics , chemistry , wavelength , electronic engineering , organic chemistry , chromatography , quantum mechanics , composite material , thermodynamics , engineering , meteorology
Tunable diode laser absorption spectroscopy (TDLAS) is a new trace gas detective method developed with the combination of a diode laser source and a long absorption path. It has the significant advantage not only in sensitivity but also in rapidity of response. The concentration of the ambient methane has been measured using a TDLAS system developed in the laboratory. The system has some advantage s, such as sensitivity, low detective limit (below 0.087mg/m33) an d rapidity of response, and also it is easy to be integrated to a portable apparatus to mon itor the methane concentration in the atmosphere.