초록 ▼

The present invention provides a spectroscopic method for analyzing isotopes which makes it possible to simplify a system for measurement and to identify isotopes with high accuracy and sensitivity and to carry out quantitative analysis. The spectroscopic method for analyzing isotopes uses a semicon

The present invention provides a spectroscopic method for analyzing isotopes which makes it possible to simplify a system for measurement and to identify isotopes with high accuracy and sensitivity and to carry out quantitative analysis. The spectroscopic method for analyzing isotopes uses a semiconductor laser beam having as a wavelength zone a 2000 nm-wavelength band as a beam source of wavelengths of the absorption spectra of the isotopes. A reference gas is used for identification of the isotopes where the gas contains collating components having two wavelengths (W 1 , W 2 ) of well-known absorption spectra in wavelength bands close to the wavelengths (w 1 , w 2 ) of the absorption spectra of the isotopes.

대표청구항 ▼

1. A spectroscopic method for analysing isotopes contained in gas to be measured by identifying and quantitatively measuring isotopes by using wavelengths of absorption spectra absorbed in existence of said isotopes, the improvement is characterized in that the method comprises the steps ofusing a s

1. A spectroscopic method for analysing isotopes contained in gas to be measured by identifying and quantitatively measuring isotopes by using wavelengths of absorption spectra absorbed in existence of said isotopes, the improvement is characterized in that the method comprises the steps ofusing a semiconductor laser beam as a beam source for said wavelengths of said absorption spectra; andusing a reference gas selected from the group consisting of hydrogen bromide, water, nitrogen oxide and mixtures thereof for identification of said isotopes, wherein said reference gas. 2. The spectroscopic method for analysing isotopes according to claim 1, whereinsaid semiconductor laser beam source emits a beam of spectra having wavelength zone of 2000 nm band. 3. The spectroscopic method for analyzing isotopes according to claim 2, whereinsaid isotopes of carbon dioxide gas as sample gas are 12 CO 2 and 13 CO 2 ; andsaid 12 CO 2 and 13 CO 2 have pairs of following wavelengths(a wavelength of isotope 12 CO 2 (nm)):(a wavelength of isotope 13 CO 2 (nm))2054.37:2053.962044:2044.492035.34:2035.632010.18:2016.292002.51:2002.541995.99:1996.10and a abundance ratio is measured by an absorbance in accordance with said a respective pair of wavelengths. 4. The spectroscopic method for analysing isotopes by using a semiconductor, which comprises the steps ofidentifying said isotopes by using absorption spectra of hydrogen bromide as reference gas having well-known collating components, said absorption spectra having wavelength band according to claim 4; andidentifying existence of impurities generating absorption spectra at said wavelength band. 5. The spectroscopic method for analyzing isotopes according to claim 1, whereinsaid isotopes of carbon dioxide gas as sample gas are 12 CO 2 and 13 CO 2 ; andsaid 12 CO 2 and 13 CO 2 have pairs of following wavelengths(a wavelength of isotope 12 CO 2 (nm)):(a wavelength of isotope 13 CO 2 (nm))2054.37:2053.962044:2044.492035.34:2035.632010.18:2010.292002.51:2002.541995.99:1996.10and a abundance ratio is measured by an absorbance in accordance with said a respective pair of wavelengths.