The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 2010
Filed:
Oct. 29, 2004
Masaaki Mori, Hirakata, JP;
Yasuhiro Kubo, Konan, JP;
Yasushi Zasu, Kyoto, JP;
Masayuki Tani, Hirakata, JP;
Tamotsu Hamao, Kyoto, JP;
Masaaki Mori, Hirakata, JP;
Yasuhiro Kubo, Konan, JP;
Yasushi Zasu, Kyoto, JP;
Masayuki Tani, Hirakata, JP;
Tamotsu Hamao, Kyoto, JP;
Otsuka Pharmaceutical Co., Ltd., Tokyo, JP;
Abstract
As previous processing of measurement in which gas to be measured containing, as gas components, carbon dioxideCOand carbon dioxideCO, is introduced into a cell, and in which the intensities of transmitted lights having wavelengths suitable for measurement of the respective gas components, are measured and then data-processed to measure the concentrations of the gas components, the air having a predetermined volume Va is sucked by a gas injection device, a gas exhaust valve Vof a cellis closed and the air stored in the gas injection deviceis transferred to the cellfilled with the air at an atmospheric pressure, thereby to pressurize the cell inside. The pressure thus pressurized is measured as P. The cell volume Vc is subtracted from the product obtained by multiplying the sum. Vof the volume Va and Vc the cell volume Vc, by the ratio P/P in which Pis the target pressure of the gas to be measured at which a calibration curve has been prepared for an isotope gas analysis and measurement, thus determining the one-time gas injection amount of the gas injection device. Thus, measured concentration variations based on changes in atmospheric pressure can be corrected.