Specimen Required

Patient preparation:

1. Fasting: 8 hours, required

2. Do not order on patients who have recently received methotrexate or other folic acid antagonists.

Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume:0.6 mL Serum

Collection Instructions:

1. Within 2 hours of collection, centrifuge the specimen.

2. For red-top tubes aliquot the serum into a plastic vial.