A comparison of two methods of quality control of pH, Pco2, and Po2 measurements.

pH, Pco2, and Po2 measurements have been made over a three-week period on General Diagnostics Blood GAS Control Ampoules and on a tonometered buffer system. The latter seems adequate as a precision and accuracy control of pH, Pco2, and Po2 measurements in a single solution. The former seems adequate as a precision control of these measurements, but, on the particular batch provided, mean values need to be determined within the customer's laboratory.