Quantitative Analysis of Alkane Gases by Infrared Absorption Spectrometry Based on Spectral Comprehensive Pretreatment Method

Infrared absorption spectroscopy for quantitative analysis of alkane gases has been widely used in the fields energy exploration, geological survey, coal-bed methane analysis, and atmospheric environment monitoring. With rapid development science technology, various research have put forward higher requirements on detection accuracy limits gas analysis. Spectral pretreatment is very important infrared spectroscopy, which can effectively improve accuracy, but there were few studies spectral technology at this stage. In paper, a comprehensive method based smoothing noise reduction, deconvolution baseline drift correction was proposed spectra gases. The optimal parameters investigated typical pre-processed. increase probability selecting variables with significant features data, It also quality some weak signals extend lower limit downward order to expand range.