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:
Dec. 21, 1993
Filed:
Feb. 19, 1993
Youzo Morita, Kyoto, JP;
Shimadzu Corporation, Kyoto, JP;
Abstract
A carbon analyzer capable of measuring carbon contents of both liquid and solid samples under appropriate conditions includes not only basic components of a total organic carbon (TOC) analyzer such as a carrier gas supplying unit 22, a sample injection unit 2 for a liquid sample 6, a liquid sample combustion-oxidation vessel 12 and a CO.sub.2 detector 46, but also a solid sample intake unit 26 for receiving a solid sample, converting its carbon components into CO.sub.2 and sending it into the CO.sub.2 detector 46 together with a carrier gas. The CO.sub.2 detector 46 is a non-dispersive infrared analyzer with two measuring cells 48a and 48b having different lengths and disposed in series with a light flux such that the light flux will have different optical path lengths through these measuring cells 48a and 48b. A switching valve 44 serves to direct the gas to be tested selectively to either of the measuring cells 48a and 48 b and the carrier gas to the other as a purge gas.