Co-Oximetry EQA | RIQAS

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The RIQAS CO-Oximetry EQA programme is a comprehensive programme suitable for monitoring the performance of 7 CO-Oximetry parameters. All samples are supplied in a lyophilised format, providing greater stability and ensuring clinically relevant levels.

  • Lyophilised (January 2024)
  • Monthly reporting
  • 24 hour open-vial stability once reconstituted
  • Submit results and view reports online via RIQAS.Net
  • Register up to five instruments per programme (volume permitting) at no extra cost for comparative performance assessment

Not accredited to ISO/IEC 17043

Cat NoKit SizeFrequencyCycle StartParameters
RQ9177 *1 mlMonthly (1 x 12 month cycle)January7
RQ9177/A **1 mlMonthly (1 x 12 month cycle)January7

Note to participants with multiple instruments on the CO-Oximetry Programme:
RQ9177 must be purchased for the first registered instrument and individual RQ9177/A kits purchased for each subsequently registered instrument.

Please note, product availability may vary country to country.


  • Carboxyhaemoglobin (COHb / HbCO)
  • Methaemoglobin (MetHb)
  • Oxygen Content (O₂CT)
  • Oxygen Saturation (sO / Vol O)
  • Oxyhaemoglobin (OHb / HbO)
  • Total Haemoglobin (tHb)
  • Reduced / Deoxyhaemoglobin (RHb / HHb)

About CO-Oximetry EQA

Co-oximetry is a methodology, also known as spectrophotometry, that measures the levels of the oxygen-carrying protein haemoglobin, which is the chief component of red blood cells. Co-oximetry is a useful tool in that it helps determine the levels of various forms of haemoglobin.

Spectrophotometric methods date back to studies by Sir Isaac Newton in the 1600s. Work by Lambert (1760) and Beer (1852) resulted in the Beer-Lambert law which describes the transmission / absorption of light in solutions (Chatburn, 2014).

A high value for the Co-Oximetry Blood Test may indicate, among other things:

  • Carbon monoxide poisoning
  • Congenital haemoglobin disorder

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