Tandem Mass Spectrometry
Serum or Plasma
UCSD Biochemical Genetics
2 mL Blood
Light Green (Lithium Heparin PST)
Plasma collected in sodium heparin (dark green-top) tube is also acceptable. Serum collected in a red-top or serum separator tube (SST) is also acceptable but only as an alternative if needed.
1 mL Plasma
0.5 mL Plasma
Centrifuge, separate serum or plasma within 20 minutes, and promptly freeze. Ship frozen. Complete UCSD Biochemical Genetics requisition and submit with specimen.
Acylcarnitines are very useful in diagnosing mitochondrial fatty acid beta oxidation disorders and several othe rorganic acidemias.