CONSTITUENT CONCENTRATION ANALYZER AND CONSTITUENT CONCENTRATION ANALYSIS METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a constituent concentration analyzer and a constituent concentration analysis method that eliminate dispersion of a plurality of constituents contained in a sample or disturbance of an environmental factor such as temperature, and accurately identify a constituent concentration to be measured. PSOLUTION: This constituent concentration analyzer includes a photoacoustic signal detecting means 11 that generates mixed light by mixing two lights of variable wavelength by intensity-modulating each of them with same-frequency signals of opposite phase, irradiates the sample with the mixed light and detects sound wave generated from the sample, and acquires spectral data for each of the two lights from the sound wave, and an arithmetic means 12 that calculates the difference between spectral data for the two lights acquired by the photoacoustic signal detecting means 11 and measures the concentration of the constituent to be measured contained in the sample. PCOPYRIGHT: (C)2011,JPO&INPIT