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The Urine Reagent Strip Rapid Test is based on a double sequential enzyme reaction.Â One enzyme, glucose oxidase, catalyzes the formation of glucomic acid and hydrogen peroxide from the oxidation of glucose.Â A second enzyme, peroxidase, catalyzes the reaction of hydrogen peroxide with potassium iodide chromogen to oxidize the chromogen to colors ranging from blue-green to greenish-brown through brown and dark brown. The test area of the Urine Reagent Strip Rapid Test is specific for glucose; no substance excreted in urine other than glucose is known to give a positive result.Approximately 100 mg/dl glucose in urine is detectable. The Urine Reagent Strip Rapid Test is based on the protein error-of-indicator principle.Â At a constant pH, the development of any green color is due to the presence of protein.Â Colors range from yellow for a Negative reaction, to yellow-green and green to blue-green for a Positive reaction.