Collect: 24-hour urine. Specimen must be refrigerated during collection.
Specimen Preparation: Do not use additives or preservatives. Transfer one 5 mL aliquot from a well-mixed 24-hour collection to ARUP Standard Transport Tubes. (Min: 2.1 mL) Record total volume on transport tube and test request form.
Storage/Transport Temperature:CRITICAL FROZEN. Additional specimens must be submitted when multiple tests are ordered.
Unacceptable Conditions: Thawed specimens.
Stability (collection to initiation of testing): Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 month
