Lt green plasma separator (PST)

Immediately following collection, mix sample thoroughly by gentle inverting 8 - 10 times to prevent clotting

Spin within two (2) hours of sample collection

Lt green plasma separator (PST)

Gold serum separator (SST) tube

Red serum vial/tube - 4 mL

Immediately following collection, thoroughly mix sample by gently inverting 5 times

1. Allow serum sample to clot for a minimum of 30 minutes
2. Spin within two (2) hours of sample collection

Gold serum separator (SST) tube

False bottom plasma/serum transport vial/tube (AHL)

Refrigerated (preferred) - 7 days

Ambient - 2 days

Frozen - 3 months

• Improper labels (unlabeled or mislabeled)
• Hemolysis (some procedures)
• Improper anticoagulant or ratio
• Delay in transport
• Improper storage temperature affecting results
• Inappropriate timing of collection
• Improper container
• Leaking container resulting in compromised specimen
• Quantity not sufficient (QNS)

Homogeneous enzyme immunoassay

6.0 - 20.0 µg/mL

>40 µg/mL

If total valproic acid is >150 μg/mL, no call