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Test Compendium

Test Name


Test Code

  • 6804

Test Synonym

  • Carboxyhemoglobin

Minimum Volume

  • 0.6 mL

Specimen Type

  • Whole Blood

Primary Container

  • Lavender Top Tube, Green Top Tube

Transport Temp

  • Refrigerated


  • 3 days

Specimen Requirements

  • Lavender-top (EDTA) tube or green-top (heparin) tube; 7 mL WHOLE BLOOD submit original FULL, UNOPENED tube. Refrigerate immediately after collection. Do not remove cap.

Specimen Retention

  • Sampling time is end of shift for industrial exposure monitoring. Analytes with timing end of shift (meaning the last two hours of exposure) are eliminated rapidly with a half-life less than five hours. Such compounds do not accumulate in the body and, therefore, their timing is critical only in relation to the exposure period.