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Some new algorithms applicable to potentiometric titration in acid-base systems.
1Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University, 30-060 Kraków, Poland.
Talanta
|September 1, 1992
Summary
This study introduces novel regression equations for determining chemical system parameters like concentrations and equilibrium constants. The method utilizes specialized functions for accurate analysis of hydrolyzable salts and acid-base mixtures.
Area of Science:
- Analytical Chemistry
- Physical Chemistry
Background:
- Accurate determination of chemical parameters is crucial in various scientific disciplines.
- Existing methods may have limitations in analyzing complex systems involving hydrolyzable salts and acid mixtures.
Purpose of the Study:
- To develop and present novel regression equations for determining chemical parameters.
- To apply these equations to systems with hydrolyzable salts and monoprotic/polyprotic acids or their salts.
- To provide a method applicable to systems at constant ionic strength.
Main Methods:
- Development of regression equations based on charge and mass balances.
- Application of unconventional Padé functions (W = G(1)(h)/G(2)(h)) and reciprocal functions (1/W = phi(h)).
- Utilizing the MINUITS computer program for parameter calculation.
Main Results:
- The proposed regression equations accurately determine parameters like concentrations, equilibrium constants, and hydrogen-ion activity coefficients.
- The method is effective for analyzing mixtures of acids and/or their salts.
- The approach is validated for systems at constant ionic strength.
Conclusions:
- The developed regression equations offer a robust method for chemical system analysis.
- The application of Padé and reciprocal functions provides new tools for titration data interpretation.
- The method shows potential for broader applications, including mixed complexes and extraction systems.
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