Collect: Plain red. Also acceptable: Green (sodium heparin).
Specimen Preparation: Separate serum or plasma from cells within one hour of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Storage/Transport Temperature: Refrigerated. If transport is prolonged: Frozen.
Unacceptable Conditions: Specimens collected in citrate or oxalate/fluoride. Specimens exposed to repeated freeze/thaw cycles.
Stability (collection to initiation of testing): After separation from cells: Ambient: 4 hours; Refrigerated: 1 week; Frozen: 2 weeks
