A Calibration Database Software of Fourier Transform Infrared Spectroscopy

Abstract

Abstract:

Fourier transform infrared spectroscopy has advantages of high resolution, large flux, wide frequency band, and is widely used in the field of trace element analysis. In the online monitoring process of atmospheric pollution composition, accurate standard spectral database is the first condition and calculation basis of atmospheric composition detection. A set of calibration spectra database platform used in the online analysis by infrared spectrum is presented. The factors with affecting spectral instruments, including the instrument resolution, apodization functions and the solid angle of incident radiation, etc, are studied in the use of the Fourier infrared spectrometer by the process of actual measurement. On this basis, the instrument lineshape function of the Fourier transform infrared spectrometer is modeled. Then the true high resolution spectrum was degraded from high resolution to low resolution, which closely modeled the true measured spectra by a real spectrometer. A set of infrared quantitative calibration database based on HITRAN is established. The simulation of calibration spectra based on the database are given. The database can be used in the infrared spectral analysis of trace gas and trace element research.

Key words: Fourier transform infrared spectrometry, resolution, apodization, instrument lineshape function, standard spectrum, database

CLC Number:

O657.3

CAO Ying, XU Liang, LIU Jian-Guo, TONG Jing-Jing. A Calibration Database Software of Fourier Transform Infrared Spectroscopy[J]. Journal of Atmospheric and Environmental Optics, 2013, 8(5): 344-353.

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