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. 29, 2017
Filed:
Apr. 02, 2015
Applicant:
Hach Company, Loveland, CO (US);
Inventors:
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 33/18 (2006.01); G01N 33/84 (2006.01);
U.S. Cl.
CPC ...
G01N 33/182 (2013.01); G01N 33/84 (2013.01);
Abstract
An aspect provides a method of determining a concentration of free chlorine in an aqueous sample, including adding a reagent to the sample, the reagent being reactive with the free chlorine at a first kinetic rate and reactive with at least one chloramine at a second kinetic rate, the first kinetic rate being different from the second kinetic rate; measuring an absorbance response over time resulting from reaction of the free chlorine and the at least one chloramine with the reagent over time; and determining the concentration of the free chlorine in the sample based on a determined rate of change of the absorbance response over time. Other aspects are described and claimed.