A New Titration Method Based on Concentration-Variable Patterns. Principles and Applications to Acid-Base and Redox Titrations.

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  • Zhang Chong-Liang
    Department of Chemistry, College of Science, Rikkyo (St. Paul’s) University
  • Narusawa Yoshio
    Department of Chemistry, College of Science, Rikkyo (St. Paul’s) University

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  • New Titration Method Based on Concentra

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Abstract

A new titration method based on concentration-variable patterns is presented. Since this titration method is characterized by a non-dilution and a non-gradient operation, no volume correction is necessary, and the influence of the matrix is indifferent. The proposed method is applied to acid–base and redox titrations. In addition, a new approach for equivalence-point detection is established, where the equivalence point can be mathematically determined by solving simultaneous linear equations before and after the equivalence point. Indicators or first-derivative and second-derivative treatments are no longer necessary, and the accuracy and precision in the equivalence point have been improved, compared with the traditional titration method. The titration error has been decreased to such levels as 0.1 pH for acid–base titrations, and of 0.01 V unit for redox titrations.

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