COMPONENT CONTENT ESTIMATING METHOD BY NEAR INFRARED SPECTRAL ANALYSIS

摘要

PURPOSE: To reduce a measurement error due to temperature in quantitative analysis by a near infrared spectral analysis method. ;CONSTITUTION: At the time of obtaining absorbance of a near infrared ray and an analytical curve of a component content, if the temperature dependency of a term composed of dominant wavelengthes is positive or negative, a term composed of absorbances of negative or positive inverse characteristic wavelengthes is used to cancel the temperature fluctuation of absorbance in each wavelength. Thus, a temperature error due to temperature in the component content measurement of an unknown sample by near infrared spectral analysis can be reduced so as to improve the measurement accuracy. In the case of measurement by grinding a sample, though heretofore it is necessary to perform measurement after the ground sample is cooled to the atmosphere temperature, the component content can be measured without cooling.;COPYRIGHT: (C)1995,JPO