
Vitamin B12 Binding Capacity
0070260
Ordering Recommendation
Mnemonic
B12B
Methodology
Quantitative Radioimmunoassay
Performed
Mon, Thu
Reported
1-5 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
- Patient Preparation
- Patient should fast for 12-15 hours prior to collection. Vitamin B12 supplements should not be administered within 72 hours of drawing blood for this test.
- Collect
- Serum separator tube or plain red.
- Specimen Preparation
- Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.1 mL)
- Storage/Transport Temperature
- Refrigerated.
- Unacceptable Conditions
- Plasma.
- Remarks
- Stability
- After separation from cells: Ambient: 6 hours; Refrigerated: 1 week; Frozen: 1 month
Reference Interval
800-2600 pg/mL
Interpretive Data
This assay measures the unsaturated binding capacity of serum for vitamin B12.
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
0070260 | Vitamin B12 Binding Capacity | 2171-7 |
Aliases
- B12, B12B
- transcobalamin