... , Specific Gravity, pH, Ascorbic Acid, Microalbumin Instruction:Dip the test patch of a fresh strip into urine sample, or pass ... urine in a clean dry container.Urine presevatives may affect test results. Preservatives will not prevent the deterioration of ketones, ... growth from contaminating organisms may affect glucose, ph and blood test results.VISUAL READING TECHNIQUE: 1, Immerse all reagent areas ...