Location of end-points in high-precision coulometry.
A computer has been used to fit a cubic equation to experimental data obtained in the region of the end-point in high-precision coulometric titrations of 4-aminopyridine and tris(hydroxy-methyl) aminomethane. For these weak bases, the two end-points (points of inflexion calculated by setting the second derivative equal to zero) obtained by choosing first time, and secondly pH, as the independent variable, are in good agreement.
Koch
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WF
Department of Chemistry, Iowa State University, Ames, Iowa 50010, USA.
Poe
D P
DP
Diehl
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