US 12,461,024 B2
Colorimetric analysis of chlorine bleach
Oleh Weres, Reno, NV (US)
Filed by Oleh Weres, Reno, NV (US)
Filed on Dec. 3, 2024, as Appl. No. 18/967,558.
Claims priority of provisional application 63/606,538, filed on Dec. 5, 2023.
Prior Publication US 2025/0180470 A1, Jun. 5, 2025
Int. Cl. G01N 21/31 (2006.01)
CPC G01N 21/31 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method to determine active chlorine in bleach which comprises
forming a mixed solution comprising
a predetermined volume fraction of chlorine bleach,
a soluble bromide salt in stoichiometric excess to hypochlorite in the bleach, and
a buffer, wherein the acid component of the buffer is in stoichiometric excess to alkali in the bleach,
allowing time for absorption of light by the solution to develop, and
measuring absorbance of light at a preselected wavelength,
whereby said measured absorbance is essentially proportional to the concentration of active chlorine in the bleach.