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HelpTest Code 4017616 Vitamin B12
Specimen Requirements
1.0 mL Serum or plasma
NOTE: Serum/plasma should be separated from cells with in 2 hours of collection.
Container
PST (light green top) tube or SST (tiger, gold, or red top) tube
Minimum Volume
50µL serum/plasma
Stability
24 hours at room temperature, 48 hours at 2-8°C
May be frozen at -20° for longer storage
Reject Due To
Hemolyzed sample
Incorrectly labeled sample
Analytical Time
Same day
Sample Retention Time
7 days
CPT Code
82607
Method
Chemiluminescent Immunoassay
Performing Laboratory
Springfield Hospital Laboratory