Collect: 24-hour urine. Refrigerate during collection. Also acceptable: Urine supernate.
Specimen Preparation: Transfer two 4 mL aliquots from a well-mixed 24-hour urine collection to individual ARUP Standard Transport Tubes. (Min: 3 mL) Record total volume and collection time interval on transport tube and test request form.
Storage/Transport Temperature: Refrigerated.
Stability (collection to initiation of testing): Ambient: 2 hours; Refrigerated: 1 week; Frozen: Unacceptable
