Optical measuring method of expiration components
First Claim
1. An optical measuring method for expiration components, comprising the steps of:
- previously selecting wavelengths having excellent correlations between component concentrations as well as nitrogen concentration and Raman spectral intensity values as measuring wavelengths being specific to said components as well as nitrogen as to respective said components to be measured as well as nitrogen;
previously preparing a calibration curve as to Raman spectral intensity ratios of respective said components to nitrogen and concentrations as to respective said expiration components;
irradiating an expiration specimen with Raman excitation light;
measuring Raman spectra at said measuring wavelengths being previously selected as to said components to be measured as well as nitrogen for obtaining said Raman spectral intensity ratios of said components to said Raman spectral of intensity of nitrogen; and
quantitatively analyzing said components on the basis of Raman spectral intensity values of said components.
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Abstract
As to respective expiration components to be measured, wavelengths having excellent correlations between component concentrations and Raman spectral intensity values are previously selected as measuring wavelengths which are specific to the components, an expiration specimen is irradiated with Raman excitation light, Raman spectra at the measuring wavelength which is specific to nitrogen and those at the measuring wavelengths previously selected for the components to be measured respectively are measured, Raman spectral intensity ratios of the components to the Raman spectral intensity of nitrogen are obtained, and the respective expiration components are quantitatively analyzed through a calibration curve which is previously prepared as to the Raman spectral intensity ratios of the respective components to nitrogen and concentrations. It is possible to provide a measuring method utilizing Raman spectroscopy, which can directly determine intra- expiratory components in a short time with no requirement for expendable items.
43 Citations
8 Claims
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1. An optical measuring method for expiration components, comprising the steps of:
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previously selecting wavelengths having excellent correlations between component concentrations as well as nitrogen concentration and Raman spectral intensity values as measuring wavelengths being specific to said components as well as nitrogen as to respective said components to be measured as well as nitrogen; previously preparing a calibration curve as to Raman spectral intensity ratios of respective said components to nitrogen and concentrations as to respective said expiration components; irradiating an expiration specimen with Raman excitation light; measuring Raman spectra at said measuring wavelengths being previously selected as to said components to be measured as well as nitrogen for obtaining said Raman spectral intensity ratios of said components to said Raman spectral of intensity of nitrogen; and quantitatively analyzing said components on the basis of Raman spectral intensity values of said components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification