High-Sensitivity Detection of Methane Near 6106 cm-1 Using Tunable External-Cavity Diode Laser
スポンサーリンク
概要
- 論文の詳細を見る
An external-cavity diode laser (ECDL) was employed to acquire spectrally resolved absorption profiles of methane lines in the R (9) manifold of the $2\nu_{3}$ band near 6106 cm-1. The profiles were applied to high sensitivity detection of methane by low-frequency wavelength modulation spectroscopy (WMS) and harmonic detection (HD). In this study, the absorption profile near 6105.625 cm-1 is adopted. By measuring variations of signal amplitude at low concentrations of gas and background noise with frequency modulation amplitude (FMA), a group of optimum FMAs was obtained for 2f, 4f and 6f harmonic signals. Under these optimum conditions, minimum detectable absorbences (MDAs) of $4.7\times 10^{-4}$, $1.6\times 10^{-4}$ and $6.5\times 10^{-5}$, respectively, were realized; however $1.4\times 10^{-3}$ was obtained for direct absorption (DA).
- 2005-04-15
著者
-
Wang Lirong
College Of Chemistry Central China Normal University
-
Dong Lei
College Of Physics And Electronics Engineering Shanxi University State Key Laboratory Of Quantum Opt
-
Ma Weiguang
College Of Physics And Electronics Engineering Shanxi University State Key Laboratory Of Quantum Opt
-
Jia Suotang
College Of Physics And Electronics Engineering Shanxi University State Key Laboratory Of Quantum Opt
-
Yin Wangbao
College Of Physics And Electronics Engineering Shanxi University State Key Laboratory Of Quantum Opt
-
Li Changyong
College Of Physics And Electronics Engineering Shanxi University State Key Laboratory Of Quantum Opt
-
Jia Suotang
College of Physics and Electronics Engineering, Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan 030006, China
-
Wang Lirong
College of Physics and Electronics Engineering, Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan 030006, China
-
Ma Weiguang
College of Physics and Electronics Engineering, Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan 030006, China
-
Dong Lei
College of Physics and Electronics Engineering, Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan 030006, China
-
Li Changyong
College of Physics and Electronics Engineering, Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan 030006, China
-
Yin Wangbao
College of Physics and Electronics Engineering, Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan 030006, China
関連論文
- Determination of Chitosan by Cathodic Stripping Voltammetry
- High-Sensitivity Detection of Methane Near 6106cm^ Using Tunable External-Cavity Diode Laser
- Polarographic Determination of Total Iron Content Using a Fe^-Methylthymol Blue-NO_2^- System
- High-Sensitivity Detection of Methane Near 6106 cm-1 Using Tunable External-Cavity Diode Laser