Gas Chromatography/Mass Spectrometry
Serum or Plasma
UCSD Biochemical Genetics
4 mL Blood
Light Green (Lithium Heparin PST)
Plasma collected in sodium heparin (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.
2 mL Plasma
1 mL Plasma
Centrifuge, separate serum or plasma within 20 minutes, and promptly freeze. Complete UCSD Biochemical Genetics requisition and submit with specimen frozen.
Included in Organic Acid Comprehensive, Quantitative. Quantitation of MMA excretion can be used to follow the clinical status and therapeutic response of patients with methylmalonic acidemia.