Saliva functions Saliva buffer capacity The ability of the saliva to maintain the pH when exposed to acids is termed buffer capacity. Buffer systems in saliva: 1.The bicarbonate buffer system CA CA C02+H2O←→H2C03←一HO3+Ht 2.The phosphate buffer system 4907 NIVERSaliva functions Saliva buffer capacity The ability of the saliva to maintain the pH when exposed to acids is termed buffer capacity. Buffer systems in saliva: 1. The bicarbonate buffer system CO2+H2O H2CO3 HO3 - + H+ CA CA 2. The phosphate buffer system