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Test Code VITB2 Riboflavin (Vitamin B2), Plasma

Important Note

Use Sunquest code VITB2S to order

Secondary ID


Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Portions of this test are covered by patents held by Quest Diagnostics

Specimen Type

Plasma Heparin

Shipping Instructions

Ship specimen in amber vial to protect from light.

Specimen Required

Patient Preparation: Fasting-overnight (12-14 hours) (infants-draw prior to next feeding)

Supplies: Amber Frosted Tube, 5 mL (T192)

Collection Container/Tube:

Preferred: Green top (sodium or lithium heparin)

Acceptable: Light-green top (sodium or lithium heparin plasma gel)

Submission Container/Tube: Amber vial

Specimen Volume: 0.5 mL

Collection Instructions: Centrifuge within 2 hours of collection and aliquot to amber vial.

UChicago Medicine Medical Laboratories Note:

Offsite collection instructions:


Overnight fast (12 to 14 hours)


Place sample on ice right after the draw, protect from light


Spin sodium heparin top

Aliquot plasma in amber tube

Place in the freezer ASAP until courier pick up

Send frozen sample on dry ice to the Main Lab (Laboratory Service Center)

Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Plasma Heparin Refrigerated (preferred) 28 days LIGHT PROTECTED
  Frozen  28 days LIGHT PROTECTED
  Ambient  72 hours LIGHT PROTECTED

Reject Due To

Gross hemolysis OK
Gross lipemia Reject
Gross icterus OK

Reference Values

Normal: 1-19 mcg/L

Day(s) and Time(s) Performed

Monday, Wednesday, Friday

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information