Spin within two (2) hours of sample collection
Lt green plasma separator (PST)
Immediately following collection, thoroughly mix sample by gently inverting 5 times
Gold serum separator (SST) tube
Refrigerated (preferred) - 7 days
Frozen - 4 weeks
CEDIA homogenous enzyme immunoassay
5.0 - 8.0 µg/mL
>12.0 µg/mL