Expressions of the general form of the acid-base titration curve.

The titration of a multicomponent mixture can be described either with de Levie's integral representation [1] or with Moisio's and Heikonen's derivative representation [2]. In the latter method an experimental titration curve is numerically differentiated and the computations are based on the buffer capacity. Numerical calculations demonstrate that the results of these two methods coincide very well.