发明名称 |
Method for spectrometrically measuring isotopic gas and apparatus thereof |
摘要 |
A correction curve (FIG. 19) is prepared by plotting 12CO2 concentrations and 13CO2/12CO2 concentration ratios which are determined on the basis of a calibration curve and 13CO2 and 12CO2 absorbances of gaseous samples having the same 13CO2/12CO2 concentration ratio but known different 12CO2 concentrations. A gaseous test sample containing 13CO2 and 12CO2 as component gases is introduced into a cell, and spectrometrically measured. A 12CO2 concentration of the gaseous test sample is determined by way of the spectrometric measurement. A concentration ratio correction value is obtained on the basis of the correction curve and the 12CO2 concentration of the gaseous test sample thus determined. A measured 13CO2/12CO2 concentration ratio is divided by the concentration ratio correction value thus obtained for correction of the 13CO2/12CO2 concentration ratio. Thus, the measurement accuracy of the concentration ratios of the component gases can be improved.
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申请公布号 |
US6274870(B1) |
申请公布日期 |
2001.08.14 |
申请号 |
US19990303427 |
申请日期 |
1999.05.03 |
申请人 |
OTSUKA PHARMACEUTICAL CO.,LTD. |
发明人 |
KUBO YASUHIRO;MORISAWA KATSUHIRO;ZASU YASUSHI;IKEGAMI EIJI;TSUTSUI KAZUNORI;HAMAO TAMOTSU;MORI MASAAKI;MARUYAMA TAKASHI |
分类号 |
A61B5/00;A61B5/08;A61B5/083;A61B5/097;A61B10/00;G01N1/22;G01N21/03;G01N21/11;G01N21/25;G01N21/27;G01N21/31;G01N21/35;G01N21/59;G01N33/00;G01N33/497;G01N35/08;(IPC1-7):G01N21/35 |
主分类号 |
A61B5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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