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Test Compendium


Test Code

  • 6237

Test Synonym

  • Oxalic Acid


  • 2 mL

Minimum Volume

  • 0.8 mL

Specimen Requirements

  • Serum Or Plasma


  • Plain Red Top Tube, Green Top Tube, Transfer Tube- Serum, Transfer Tube- Plasma


  • Frozen

Special Instructions

  • Serum: Collect sample in Red Top Tube Plain Plasma: Collect sample in Green Top Tube (Sodium Heparin) Promptly centrifuge and separate Serum or Plasma into a chilled plastic screw capped vial. Freeze immediately, must be received at the lab Frozen. Refrigerated or Room Temp will be rejected. Plasma is only acceptable from a Green Top, any other plasma will be rejected. Recommended that patients refrain from taking excessive amounts of Vitamin C or Vitamin C rich foods for at least 48 hours prior to the collection since Ascorbic Acid at high concentration can interfere.

Additional Information

Specimen Stability

  • Room Temp: Not Stable, Refrigerated:<1 day, Frozen: 7 days