URS-10 Urine Reagent Strips (URS) for urinalysis are firm plastic strips to which several different reagent areas are affixed. Depending on the product being used, the URS provides tests for glucose, bilirubin, ketone (acetoacetic acid), specific gravity, blood, PH, protein, urobilinogen, nitrite, leukocytes, and ascorbic acid in urine. Test results may provide information regarding the status of carbohydrate metabolism, kidney and liver function, acid-base balance, and bacteriuria.