... abnormalities, liver diseases, kidney function, and urinary tract infections. Test results can be used along with other diagnostic information to ... , pH, Protein, Urobilinogen, Nitrite and Leukocytes in Urine.Test PriniciplesUrobilinogen: this test is based on the Ehrlich reaction in which p ... based on the protein-error-of-indicators principle. An ion in the specific pH indicator attracted by cation on ...