US Patent Issued to HACH on Aug. 4 for "Stabilized n,n-diethyl-p-phenylenediamine solution and method for detecting chlorine" (Iowa Inventor)

ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,699,054, issued on Aug. 4, was assigned to HACH COMPANY (Loveland, Colo.).

"Stabilized n,n-diethyl-p-phenylenediamine solution and method for detecting chlorine" was invented by Douglas Royer (Gilbert, Iowa).

According to the abstract* released by the U.S. Patent & Trademark Office: "A reagent for chlorine analysis includes N,N-diethyl-p-phenylenediamine (DPD), an inorganic chloride salt at a concentration of 0.5 M or more, and water. Additionally, a method for detecting chlorine in an aqueous sample includes subjecting a test sample to photometry. The test sample includes the aqueous sample; and a DPD reagent that includes DPD, an inorganic chloride salt at a concentration of 0.5 M o...