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:
Oct. 17, 1995
Filed:
Sep. 22, 1993
Walter Fabinski, Kriftel, DE;
Bernd Hielscher, Bad Vilbel, DE;
Peter Schlau, Frankfurt am Main, DE;
Christian Wolff, Karben, DE;
Hartmann & Braun AG, Frankfurt am Main, DE;
Abstract
An apparatus for measuring the total content of organic carbon (TOC) and nitrogen (TN) in water. The TOC value is correctly determined as the sum of the liquid, dissolved, and solid substances of a specimen of the water. The apparatus includes a NDIR gas analyzer for simultaneously measuring the concentration of CO.sub.2 and NO gas components with a phase separator, a thermal reactor, a condenser, and two amplifiers for the pneumatic signals of the receivers with an indicator for the measured TOC and TN concentrations. The specimen is split into a gaseous part and a liquid part in the phase separator. The gaseous part which essentially contains the inorganic fraction of carbon, the TIC fraction, in the form of CO.sub.2 gas is cooled in a condenser until a substantial fraction of its water vapor content is separated in the condenser by condensation. The dried gaseous part is directed via the comparison vessels as comparison gas. The gaseous part exiting from the comparison vessels is returned to the liquid part of the specimen again in its entirety and oxidized together with the latter in a thermal reactor. The gas specimen which is formed in so doing is charged via the condenser with water vapor having the same temperature as the comparison gas and is fed to the measurement chambers of the vessels as measurement gas which contains the entire carbon dioxide fraction and the entire nitrogen oxide fraction of the gas specimen.