... , Bilirubin, Ketone (acetoacetic acid), Specific Gravity, Blood, pH, Protein, Urobilinogen, Nitrite and Leukocytes in Urine.Test PriniciplesUrobilinogen: this test ... release neo-ecotypes oxide [O]. [O] oxidizes the indicator and causes the color change.Protein: The test is based on ... O] oxidizes iodide potassium, which causes the color change.Specific Gravity: Electrolyte (M+X-) in the form of salt in ...