COMPONENT CONCENTRATION MEASURING METHOD, COMPONENT CONCENTRATION MEASURING DEVICE, AND COMPONENT CONCENTRATION MEASURING DEVICE CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To measure accurately a component concentration by reducing an influence of the temperature of a specimen or a measuring object on sound wave intensity. SOLUTION: This device is equipped with a mixed-light single-light emission means for performing electrical intensity modulation of each light having two different wavelengths wherein water at a prescribed temperature shows the same absorbance, by a reverse-phase signal having the same frequency and emitting each light, and performing electrical intensity modulation of light having prescribed one wavelength between each light having the two different wavelengths and emitting the light; and a sound wave intensity measuring means for measuring the magnitude of the sound wave generated from the specimen. The mixed-light single-light emission means is characterized by emitting each light having the two different wavelengths and the light having the prescribed one wavelength alternately in a plurality of times. COPYRIGHT: (C)2007,JPO&INPIT