METHOD AND APPARATUS FOR GAS CONCENTRATION ANALYSIS

摘要

PROBLEM TO BE SOLVED: To achieve the reduction of the determination error caused by a concn. change after recovery while making an integration time long to the sensitivity and accuracy in analysis in the method and apparatus for the gas concentration analysis. SOLUTION: Org. gas is adsorbed by porous glass 4 permitting ultraviolegt rays/visible light to transmit to be cone. to desired concn. and the ultraviolet ray/visible light absorbing spectrum of the porous glass 4 having adsorbed the org. gas is measured and the difference between the ultraviolet ray/visible light absorbing spectra before and after the adsorption of org. gas is calculated to analyze the kind and concn. of the adsorbed gas.