... a fast, convenient way of testing urine Jilin Yida Medical Equipments Co., Ltd. was established in April 2000 ... bilirubin, specific gravity, Leukocytes, VC, MA) SPECIMEN COLLECTION AND PREPARATION: Collect fresh urine in a clean dry container. Use ... growth from contaminating organisms may affect glucose, ph and blood test results. For a semi-quantitative result ... after 2 min are of no diagnostic value.