METHOD FOR DETERMINING TARGET COMPONENT CONTENT IN GAS MIXTURES USING RAMAN SPECTROSCOPY

Abstract

The present invention provides a method for determining the content of target components in a gas mixture using Raman spectroscopy, which includes performing Raman spectroscopic detection of the gas mixture to obtain a Raman spectrum; selecting one characteristic peak from the Raman spectrum as a reference peak, with a component corresponding thereto serving as a reference component, and normalizing the characteristic peaks in the Raman spectrum relative to the reference peak to obtain relative Raman peak heights of the various characteristic peaks; determining the peak positions of the characteristic peaks of the various target components in the Raman spectrum of the gas mixture by combining them with the Raman spectra of the pure target components;determining molar ratios or volume ratios of target components to reference components in the gas mixture based on relative Raman peak heights of the target components and one or more regression coefficients obtained from a set of training samples of the gas mixture; and determining molar fractions or volume fractions of various target components in the gas mixture based on molar ratios or volume ratios of the target components to the reference components.;