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:
Aug. 07, 2012
Filed:
Jul. 23, 2010
Ulrich Kathe, Leonberg, DE;
Kristoff Kley, Stuttgart, DE;
Thomas Schipolowski, Stuttgart, DE;
Lydia Hoppe, Ditzingen, DE;
Ulrich Kathe, Leonberg, DE;
Kristoff Kley, Stuttgart, DE;
Thomas Schipolowski, Stuttgart, DE;
Lydia Hoppe, Ditzingen, DE;
Abstract
A method and apparatus for automated determining of the chemical oxygen demand of a liquid sample, comprising steps as follows: mixing the liquid sample with sulfuric acid; introducing a carrier gas, especially air, into the liquid sample-sulfuric acid mixture; adding an oxidizing agent to the liquid sample-sulfuric acid mixture to form a reaction mixture; heating (especially under reflux conditions) the reaction mixture at the boiling temperature of the reaction mixture for a predetermined time period; photometrically determining consumption of an oxidizing agent in the reaction mixture; and ascertaining therefrom the chemical oxygen demand of the liquid sample, wherein all steps are automatedly performed in an analytical system with the assistance of an evaluating and control unit.