One 7.5 mL serum separator tube (SST). Also acceptable: 4 mL green top tube (heparin) or 4.5 mL light green plasma separator tube (PST).
Handling:
Centrifuge SST or PST within 2 hours and transport in original tube. Centrifuge green (heparin)top tube within 2 hours, separate plasma from cells and pour into a plastic vial. Refrigerate. Freeze if specimen cannot be assayed within 48 hours. Allow no more than one freeze/thaw cycle.
Stability:
48 hours refrigerated.
Standard Volume:
0.5 mL serum or plasma.
Minimum Volume:
150 µL serum or plasma.
Transport:
Refrigerated, or if frozen, on dry ice.
Rejection Criteria:
Specimen frozen and thawed more than once; refrigerated specimen received in laboratory more than 48 hours after collection.
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