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:
Jun. 09, 2015
Filed:
Mar. 07, 2012
Applicant:
Heinz Rudde, Hueckelhoven, DE;
Inventor:
Heinz Rudde, Hueckelhoven, DE;
Assignee:
HACH LANGE GMBH, Berlin, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/78 (2006.01); G01N 21/00 (2006.01); G01N 31/22 (2006.01);
U.S. Cl.
CPC ...
G01N 21/78 (2013.01); Y10T 436/173076 (2015.01); Y10T 436/17 (2015.01); G01N 31/227 (2013.01);
Abstract
A method of determining a concentration of nitrate includes mixing an acid with a first mixture comprising an aldehyde, a chloride and at least one of a nitrate sample and distilled water so as to obtain a second mixture. The second mixture is reacted with a phenol so as to develop a color in a third mixture after a reaction time. The concentration of nitrate is determined colorimetrically with the third mixture.