Immediately following collection, thoroughly mix sample by gently inverting 5 times
1. Allow sample to clot for a minimum of 30 minutes
2. Spin within two (2) hours of sample collection
Gold serum separator (SST) tube
Ambient (preferred) - 4 weeks
Refrigerated - 4 weeks
Frozen - 3 months
Enzyme Immunoassay (EIA)
< 0.35 kU/L