reference ranges for urine tests reference ranges for urine tests reference ranges for urine tests are described below: measurement lower limit upper limit unit urinary specific gravity 1.003 1.030 g/ml urobilinogen 0.2 1.0 ehrlich units or mg/dl free catecholamines, dopamine 90 420 μg/d red blood cells (rbcs) 0 2 - 3 per high power field (hpf) rbc casts n/a 0 / negative white blood cells (wbcs) 0 2 ph57(unitless) protein0trace amounts glucosen/a0 / negative ketonesn/a0 / negative bilirubinn/a0 / negative bloodn/a0 / negative nitriten/a0 / negative leukocytesn/a0 / negative referenceranges in: blood urine csf feces vital signs