US 12,216,054 B2
Method for measuring monochloramine with a thiocarbamate indicator and buffer
Amit Das, Timnath, CO (US)
Assigned to HACH COMPANY, Loveland, CO (US)
Filed by HACH COMPANY, Loveland, CO (US)
Filed on Oct. 14, 2020, as Appl. No. 17/070,113.
Application 17/070,113 is a continuation in part of application No. 16/411,855, filed on May 14, 2019, granted, now 11,506,605.
Prior Publication US 2021/0025862 A1, Jan. 28, 2021
Int. Cl. G01N 21/64 (2006.01); G01N 21/77 (2006.01); G01N 31/22 (2006.01); G01N 33/18 (2006.01); C07D 311/16 (2006.01)
CPC G01N 21/643 (2013.01) [G01N 21/77 (2013.01); G01N 31/22 (2013.01); G01N 33/18 (2013.01); C07D 311/16 (2013.01); G01N 2021/6439 (2013.01); G01N 2021/7786 (2013.01); Y10T 436/173845 (2015.01); Y10T 436/193333 (2015.01)] 8 Claims
OG exemplary drawing
 
1. A method for measuring monochloramine in a sample solution, the method comprising:
preparing a reaction solution by combining the sample solution, a thiocarbamate derivative, and a buffer such that the reaction solution has a pH between 5 and 6, wherein the sample solution contains an amount of monochloramine;
measuring a fluorescence intensity of the reaction solution; and
producing an output of monochloramine concentration in the sample solution based upon the fluorescence intensity.