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Laboratory Medicine

Test catalogue

Vitamin B12

Test Name

Vitamin B12

Gold Tube Specimen Type/Requirements

Container Type = 1 Gold Top

Minimum Volume = 3 ml Blood

Specimen Handling

Collection Instructions: Collect sample in gold top tube. Ensure both samples and requisitions are labelled properly. Write your initials, date and time of collection on the collection label or requisition.

Laboratory Staff Instructions: Separate samples from cells as soon as possible. Thaw sample only once

Rejection Criteria: Grossly hemolyzed and icteric samples, Unlabeled or Not Sufficient Quantity samples will be rejected.

Stability: Stable at room temperature for 8 hours, refrigerated for 24 hours, or frozen at -20oC for 3 months.

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

Required Documentation

Regular HIS order or Biochemistry requisition required.

Turnaround Time (TAT)

1 hour for Trauma/Stat and 2 hours for routine.

Test Utilization

Reference Value

Therapeutic: Normal 110 – 630 pmol/L; Indeterminate 110 – 132 pmol/L; Deficient < 110 pmol/L

Test Code



Competitive Binding Immunoenzymatic Assay

Testing Location


Other Information