Does anyone know the buffer ability of CO2-NaHCO3 pair in ACSF?

Recently I checked the acsf pH before and after 95% O2/ 5% CO2 buffering and found pH value is 7.8 (7.8) and 7.6 (after) with 26mM NaHCO3 and 5% CO2. Does anyone know how to calculate the buffer...

01 January 2015 9,137 5 View