This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R).

It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.

Lt green plasma separator (PST)

Immediatley following collection, mix sample thoroughly by gently inverting 8 - 10, times to prevent clotting

1. Spin within two (2) hours of sample collection
2. Transfer plasma to a Screw-capped polypropylene frozen transport vial/tube - 4mL (LabCorp), labelled as Li hep plasma
3. Freeze

Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp)

Frozen (preferred) - 12 months

Freeze/thaw cycles: x1

Refrigerated - 24 hours

• Sample other than heparin plasma

Electrochemiluminescence Immunoassay (ECLIA)

Male: 0 - 22 ng/L

Female: 0 - 14 ng/L