Vitamin B6 (Pyridoxal 5-Phosphate)
Specimen Collection Requirements
Collect the specimen after an overnight fast.
Plasma, one 6 mL green (sodium or lithium heparin) or plasma separator tube, also acceptable: Serum in plain red top tube
CRITICAL FROZEN. PROTECT FROM LIGHT within one hour of collection, during storage and shipment. Separate plasma from cells and freeze ASAP. Separate specimens must be submitted when multiple tests are ordered.
Nonfrozen specimens, EDTA preserved specimens, whole blood
Ambient: Unacceptable; Refrigerated 1 week; Frozen 2 months
Specimens collected in EDTA yield a higher pyridoxal 5'-phosphate concentration, therefore EDTA is not acceptable.
High Performance Liquid Chromatography
Thursday, March 14, 2019 12:51:15 PM
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