Collect
Serum separator tube (SST)
Specimen Preparation
Allow specimen to clot completely at room temperature. Separate serum from cells within 2 hours of collection and send 1.0 mL serum in a screw capped plastic vial.
Alternate Specimen
Red top
Transport Temperature
Refrigerated
Rejection Criteria
Plasma
Stability
Room temperature: 8 hours
Refrigerated: 7 days
Frozen: 21 days (avoid repeated freeze/thaw cycles)