MULTI-COMPONENT SIMULTANEOUS MEASURING METHOD

摘要

PURPOSE:To simultaneously calculate the concns. of a plurality of substances dissolved in an aq. soln. only by performing the measurement of the aq. soln. by an infrared attenuation total reflection method (infrared ATR method) by preliminarily calculating absorptivity at every component in an arbitrary wave number by an infrared ATR method. CONSTITUTION:An absorption wave number peculiar to a substance can be calculated by performing the absorption spectrum analaysis of infrared absorptiometric analysis. A wave number region of 900-1200cm<-1> is an absorption wave common to saccharides, alcohol or org. acids and different from the absorption wave number of water as the fingerprint region of a substance. The separation of the absorption wave number of water and that of a dissolved substance becomes easy by the use of an infrared ATR method and the taking-out of the absorption of the fingerprint region becomes possible and the quantitative determination of the substance becomes possible. Therefore, a primary formula measuring the substance in a soln. and the relation between absorbancy and concn. in a specific wave number is preliminarily calculated to calculate the absorptivity of the wave number and plural simultaneous equations are solved to calculate the concns. of a plurality of substances dissolved in an aq. soln.