ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,821, issued on May 5, was assigned to HACH COMPANY (Loveland, Colo.).
"Powder composition, kit, and method for determining orthophosphate concentration" was invented by Sarah Anciaux (Fort Collins, Colo.) and Melinda Buyck (Nevada, Iowa).
According to the abstract* released by the U.S. Patent & Trademark Office: "A kit and powder composition are described that can be used to determine a concentration of orthophosphate in a water system. The kit includes a first powder composition including molybdate; and a second powder composition including ascorbic acid. A powder composition is also described that includes molybdate, pyrosulfate, and less than 1 wt. % ascorbic acid. A method for ...