a mathematical model has been designed for describing the dependence of the potential on ph and including changes of the activity of the primary anion a ( - ) ( of a mono- or dibasic acid ) in a test solution , extraction of the membrane ion-exchanger into the test solution by protonation in the acidic region , interference by hso ( - ) ( 4 ) during adjustment of ph with sulphuric acid .
C0003075
anion
C0022023
ion