| abstract |
(57) [Summary] [Objective] To provide a measurement method using Raman spectroscopy, which can directly and directly quantify expiratory components without using any consumables. [Constitution] For each component to be measured during exhalation, A wavelength with a good correlation between the concentration of the component and the Raman spectrum intensity is selected in advance as a measurement wavelength specific to the component, and Raman excitation light is irradiated to the breath sample, and the Raman spectrum at the measurement wavelength specific to nitrogen is selected. And, measuring the Raman spectrum at each preselected measurement wavelength for each component to be measured, obtain the Raman spectrum intensity ratio of each component to the Raman spectrum intensity of nitrogen, Raman spectrum with nitrogen for each component Quantitative analysis of each component in exhaled air using a calibration curve prepared in advance for intensity ratio and concentration. |