Abstract: A new dodecyl sulfonate-selective PVC membrane electrode based on long-chain tetraalkyhin neutral carriers was prepared. By using this electrode as the indicator electrode, tetradecylpyridinium chloride can be titrated with dodecyl sulfonate potentiometrically in a fast, continuous, non-equilibrium way. The equivalence point of this non-equilibrium potentiometric titration system can be found chemometrically with the aid of Kalman filtering. The proposed procedure and Kalman filter algorithm effectively shortened the time of analysis in potentiometric titrations.

Key words: Dodecyl sulfonate-selective electrode, Non-equilibrium potentiometric titration, Kalman filtering