... to read by urine analyzers. YIDA REAGENT STRIPS provide tests for Glucose, Protein, pH, Blood, Ketone (Ascorbic acid), Nitrite, Urobilinogen, bilirubin ... contaminating organisms may affect glucose, ph and blood test results. For a semi-quantitative result red the reagent areas at the time ... or at any time up to 60 seconds after dipping. For a qualitative result read the reagent areas between 1 and 2 ...