J. Canonne
École nationale supérieure de chimie de Lille
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Analytica Chimica Acta | 1979
Guy Nowogrocki; J. Canonne; Michel Wozniak
Abstract The automated titration system described consists of standard potentiometric apparatus and a laboratory medium-capacity computer. The computer controls the reagent additions, reads the delivered volume and the potentials, processes the data, and prints or displays the analytical results. Any parameter of the titration can be determined by multiparametric refinement. The system was tested on neutralization curves without inflexion points obtained in titrations of potassium sodium tartrate and of mixtures of fumaric and maleic acids.
Journal of The Chemical Society-dalton Transactions | 1981
Michel Wozniak; J. Canonne; Guy Nowogrocki
A new version of the refinement program MUCOMP is described. The stability constants of the complex species as well as the parameters liable to comport systematic errors (total concentration of main components and of impurities, and electrodes characteristics) are adjusted so as to minimize the weighted error-square sum of the added volume, the partial derivatives with respect to the unknown parameters being evaluated analytically. A generalized Newton–Raphson method is employed for the simultaneous calculation of the free concentrations and of the added volume. To deal with carbonate-contaminated reagents and the subsequent carbon dioxide evolution which occurs during titrations under nitrogen flow, an appropriate function for carbon dioxide departure is introduced in the proton balance and the corresponding equilibrium defect is taken into account in the weighting procedure.
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry | 1981
C. Houttemane; J. C. Boivin; Daniel Thomas; J. Canonne; G. Nowogrocki
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry | 1978
J. Canonne; J. C. Boivin; G. Nowogrocki; Daniel Thomas
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry | 1980
J. Canonne; G. Nowogrocki; J. C. Boivin; Daniel Thomas
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry | 1978
J. Canonne; J. C. Boivin; G. Nowogrocki; Daniel Thomas
ChemInform | 1982
Michel Wozniak; J. Canonne; Guy Nowogrocki
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry | 1981
C. Houttemane; J. C. Boivin; Daniel Thomas; J. Canonne; G. Nowogrocki
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry | 1978
J. Canonne; J. C. Boivin; G. Nowogrocki; Daniel Thomas
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry | 1978
J. Canonne; J. C. Boivin; G. Nowogrocki; Daniel Thomas