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Home > Vitamin B12, serum
Plain red top or SST tube.
Onsite [NJH]: Transport to lab within 1 hour.
Offsite: Separate serum from cells within 2 hours by centrifuge and aliquot into a labeled polypropylene or similar plastic tube.
Preferred volume: 1 mL serum
Minimum volume: 0.5mL serum
Grossly hemolyzed specimens, more than one freeze/thaw cycle. results will be affected by turbidity and particulate matter.
Offsite: Send frozen serum Priority Overnight via FedEx and in a well insulated container on dry ice.
8 hours at room temperature.
24 hours refigerated at 2-8°C
>24 hours frozen at -20°C
2 Step Competitive Chemiluminescent
Results same day if samples are received prior to 6PM
Contact Client Services
Advanced Diagnostic Laboratories
1400 Jackson St
Denver, CO 80206
© 2017 National Jewish Health Policies & Guidelines