Application of the Bjerrum function to the potentiometric tritration of aluminum by fluoride ions

The theoretical grounds and analytical characteristics of two analytical methods, titration to a given potential and the linearized graph method, are compared using the titration of aluminum by fluoride ions in the presence of a LaF₃ electrode as an example. It is shown that there is no fundamental difference between these two methods. The linearized graph method is simpler and more accurate than the titration to a given potential. An equation is proposed for processing the results obtained using the linearized graph. This equation eliminates systematic errors due to the retarded kinetics of complexation.