laboratory diagnostic - biochemistry - Carnitine free and total, heparin plasma 4ml frozen. Fasting samples, for neonates: collect the sample 4 hours after milk intake. Attach the completed information form supplied upon request, The plasma must be frozen within 1 hour after collection and must be sent in the frozen samples container, Tandem mass spectrometry (MS/MS), ssso, todylaboratories®, bmn, code L16LD1172