Collect: 24-hour urine with no additive. Refrigerate during collection. Also acceptable: Random urine.
Specimen Preparation: Transfer 3 mL aliquot from a well-mixed 24-hour collection to an ARUP Standard Transport Tube. (Min: 0.5 mL) Record total volume and collection time interval on transport tube and test request form.
Storage/Transport Temperature: Refrigerated.
Unacceptable Conditions: Urine collected with acid. Specimens stored at room temperature.
Stability (collection to initiation of testing): Ambient: 48 hours; Refrigerated: 1 week; Frozen: 1 month
Reference Interval:
12.0-20.0 g/d
Note:
Reference interval for random urine has not been established.
