The Computerjzed Determination of Double-layer Capacitance with the Use of Kalousek-type Waveforms and Its Application in Titrimetry
نویسنده
چکیده
A method for the rapid determination of double-layer capacitancepotential curves of electrodes is described. An on-line computer is used to apply Kalousek-type waveforms to the electrochemical cell and to measure the accompanying current response. The capacitances am determined from the slope of the plots of log current against timeFor 0.1 M KCI, the computerized method agrees weli with the bridge method, except for the potential range of 0 to -0.15 V. The method is very useful for automating titrations with teusammetric detection of the end-pointThe method is applied to the titration of barium with a macrocyclic compound (kryptofii 222) and the titration of cetyl-trimethylammonium bromide with bromocresol purple_ The accuracy of the titrations is ~2%~
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