Centralized Core Laboratory:Chemistry
Green top (sodium heparin) tube
2.5 mL (minimum 1.5 mL)
Cause for rejection:
Specimen not protected from light.
Sent to reference lab
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Remove plasma from cells ASAP
. Protect specimen from light. Specimen should be collected following an overnight (12-14 hour) fast. Patient must not consume alcohol or vitamin supplements within 24 hours prior to collection.
Indicate plasma on tube.
Reference range: 5-50 mcg/L
Pyridoxal 5-Phosphate (PLP)