Laboratory Medicine

Test catalogue

Vitamin B12
Test Name Vitamin B12
Specimen Type/Requirements Container Type = 1 Gold Top Minimum Testing Volume = 0.5mL Serum or Plasma Preferred Testing Volume = 1mL Serum or Plasma
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 -20°C for 3 months. Transportation: Send sample to core lab as soon as possible.

Vitamin B12

Test Name

Vitamin B12

Specimen Type/Requirements

Container Type = 1 Gold Top

Minimum Testing Volume = 0.5mL Serum or Plasma

Preferred Testing Volume = 1mL Serum or Plasma

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 -20°C for 3 months.

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

Reference Value

Age	Range	Units
0 up to 1 Years	118-1,107	pmol/L
1 Years up to 2 Years	197-1,107	pmol/L
2 Years up to 8 Years	190-747	pmol/L
8 Years up to 14 Years	149-772	pmol/L
14 Years up to 19 Years	132-531	pmol/L
19 Years up to Unspecified	133-675	pmol/L

Test Code

B12

Methodology

Competitive Binding Immunoenzymatic Assay

Testing Location

SMH-Biochemistry

Other Information

Last Update: August 18, 2026