Patent ID: 11953480
Assignee: HACH COMPANY
Field: Measurement (Instruments)
Classification: CPC G  A  C | IPC A  C  G

Claim 0:
1. A method for measuring peracetic acid concentration in an aqueous solution, comprising:
combining, in a reactive solution, 4-(methylthio)aniline and at least one reactive species to produce a chromophore, wherein the at least one reactive species comprises a chromotropic acid disodium salt;
placing the chromophore in an aqueous solution, wherein the aqueous solution comprises peracetic acid, wherein peracetic acid within the aqueous solution reacts with the chromophore; and
measuring a concentration of peracetic acid within the aqueous solution, wherein the measuring comprises quantifying a colorimetric change of the aqueous solution caused by the peracetic acid reacting with the chromophore.