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Laboratory Medicine

Test catalogue

Folate, Serum

Test Name

Folate, Serum

Gold Tube Specimen Type / Requirements

Container Type = 1 Gold Top (SST)

Minimum Volume = 1 ml serum

Tube must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: Collect sample in serum or heparinized plasma collected with or without gel separator. Studies have shown that degradation of folate due to fluorescent light up to one week after blood collection is small and unlikely to affect accuracy of results.

Write your initials, date and time of collection on the collection label or requisition.

Lab Instructions: Separate serum or plasma from cells within 2 hours of collection

Rejection Criteria: Gross hemolysis, unlabeled or not sufficient quantity.

Stability: Folate is stable at room temperature for 8 hours if assay will not be completed immediately, refrigerate for 48 hours and frozen for 3 months at -20°C.

Transportation: Send sample to core lab as soon as possible.

Required Documentation

Turnaround Time (TAT)

1 hour for Trauma / Stat - 2 hours for routine

Test Utilization

Reference Value

>15 mmol/L

Test Code



Competitive Binding Immunoassay

Testing Location


Other Information

Last Updated: June 06, 2019