Urine, 24-Hour Collection
Submit an entire 24-hour urine collection in a urine container. No preservative. Send specimen refrigerated.
Note: 1. Starting and ending times of collection are required.
2. Follow instructions in Urine Collections in Special Instructions.
Urine, Random Collection
30 mL (minimum volume: 25 mL) from a random urine collection in a plastic urine container. No preservative. Send specimen refrigerated.
Specimens collected for other than a 24-hour time period are reported in unit of mg/L, for which reference values are not established.
83735-Magnesium