... in a clean dry container.Urine presevatives may affect test results. Preservatives will not prevent the deterioration of ketones ... from contaminating organisms may affect glucose, ph and blood test results.VISUAL READING TECHNIQUE: 1, Immerse all reagent areas ... the quality of our urine strips. The URS-14H URINALYSIS STRIP test Urobilinogen, Bilirubin, Ketone(Acetoacetic acid), Blood, Protein, Nitrite ...