End-point evaluation in instrumental titrimetry-I Linear extrapolation of hyperbolic titration curves.
A method is described for the estimation of a systematic titration error which is introduced by linear extrapolation of hyperbolic titration curves in amperometric, photometric, and other instrumental titrations. It is assumed that the titration is based upon a single-step ion-association reaction mA + nB right harpoon over left harpoon A(m)B(n) and that the measured physical property falls within known minimum and maximum values. The procedure is suitable for end-point determination, even when the titration curves have extensive curvature, and for predicting the choice of optimum experimental conditions for a given titration.
Vrestál
J
J
Department of Chemistry, A. Zápotocký's Military Academy, Brno, Czechoslovakia.
Kotrlý
S
S