title: [A method for quantitative analysis system of alkane gaseous mixture with near infrared spectroscopy].
abstract: A method for online quantitative analysis system of alkane gaseous mixture with near infrared spectroscopy is described in the present paper. A single plane diffraction grating is used as the principal device in the monochromatic spectrum system. The key parameters of the monochromator were deduced and calculated in detail. A quantitative analysis system was designed and constructed according to the parameters. The narrow-band beam testing experiments and spectral scanning experiments of seven kinds of single-component alkane gases were accomplished on the above hardware system platform. The narrow-beam experiments show that a 10 nm narrow-band beam spectra was successfully obtained by the monochromatic system when the entrance slit width is 2 mm. And a step-scanning resolution of the outgoing beam's center wavelength with 0.1 nm can be realized within the spectra of 1.2-1.8 microm. The spectral scanning experiments indicate that there was some stronger characteristi absorption spectrum existing between the spectra of 1.6-1.8 microm, which is consistent with the HITRAN spectral database. And there is serious cross-aliasing phenomenon existing among the absorption spectra. These experiments demonstrate that this method has a successful application in mixed gas monitoring and on-line analysis with the characteristics of simple structure and low cost. And it also provides further technical reserves and opens a path way to spectral analysis in the follow-up studies.
authors.affiliation: State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China. zlj.zhy@gmail.com
authors.forename: Ling-Jian
authors.initials: LJ
authors.lastname: Zhu
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Tang
authors.forename: Zong-Ming
authors.initials: ZM
authors.lastname: Qiu
authors.forename: Jun-Hua
authors.initials: JH
authors.lastname: Liu
authors.forename: Zhong-Hua
authors.initials: ZH
authors.lastname: Zhang
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang