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HelpTest Code B12 Vitamin B12
Specimen Type
Blood
Preferred Collection Container
GRN-PSTAcceptable Collection Container
GRN-PST, SST, R-NoGel, G-NoGel
Collection Instructions
Routine venipuncture
Collection Volume
5 mL
Minimum Collection Volume
1 mL
Rejection Criteria
Specimen not centrifuged within 6 hours of collection; Gross hemolysis, gross icterus, improperly labeled specimen
Specimen Storage and Stability
Stable up to 24 hours at 2-8 C
Day(s) and Time(s) Performed
Monday through Sunday, 24 hours
EPIC Code
LAB67
Patient Preparation
Fasting specimen preferred; must draw before Schilling’s test, transfusions or B12 therapy is started.
Turn Around Time
1 day
Lab Department
Chemistry
Alias
B12; Vitamin B12, Serum; B12, Serum;
Additional Information
Transfer at least 0.5 mL (500 ul) of serum to an aliquot tube. Tighlty stopper the tube immediately. Specimen can be stored Ambient for no longer than eight hours. If tran