Patent ID: 7071470

Claim:
A multi-component analyzing apparatus in which infrared light is irradiated to a measuring-subject sample which is constituted by either measuring-subject components whose sorts or quantities are limited or by a mixed article made of said measuring-subject components; intensity of infrared light having respective wavelength ranges which are fitted to infrared absorption spectra of the respective measuring-subject components among such infrared light penetrated through the measuring-subject sample is measured by employing a plurality of detectors corresponding thereto; and said multi-component analyzing apparatus includes a calculation processing unit for analyzing the infrared light intensity of the respective wavelength ranges so as to acquire concentration of the respective measuring-subject components; wherein the calculation processing unit is operative to execute an analyzing process program for executing analysis operations of the concentration of the respective measuring-subject components by solving simultaneous equations which are constituted by equations having mutual interference correction terms used to correct interference adverse influences occurred among the respective measuring-subject components, wherein said mutual interference correction term includes a product made by multiplying a product of concentration of at least two measuring-subject components by one, or more mutual interference correction coefficients.