title: [Measurement of methane 13C/12C isotope ratio of slurry gas from oil wells by laser frequency-modulation absorption spectroscopy].
abstract: In this paper, we determined the ratio of C13/C12 of methane in slurry gas from oil wells by the method of laser frequency modulation absorption spectroscopy that has many advantages such as high precision, high spectroscopic resolution and rapidly and simply dealing with samples. This technique provided us with a subsidiary method for oil-gas source exploration. The method of laser frequency modulation absorption spectroscopy is based on the method of laser frequency absorption spectroscopy and is more accurate. And this method can be expanded to apply to others aspects easily. We only need change other appropriate laser and select right absorption peak, then we can determined the ration and concentration of diverse gases.
authors.affiliation: Key Laboratory of Atomic and Molecular Nanosciences, Ministry of Education, Department of Physics, Tsinghua University, Beijing 100084, China.
authors.forename: Jia-min
authors.initials: JM
authors.lastname: Zhang
authors.forename: Xiang-hui
authors.initials: XH
authors.lastname: Zhang
authors.forename: Jin-hai
authors.initials: JH
authors.lastname: Chen
authors.forename: Wan-yun
authors.initials: WY
authors.lastname: Ma
authors.forename: Die-yan
authors.initials: DY
authors.lastname: Chen