Electrochemical Stripping Studies Of Felodipine

Research on increasing sensitivity of electroanalytical methods has led to the development of the techniques of stripping voltammetry. The concentration step is carried out for a definite time under reproducible conditions and the stripping process in most cases is performed in some voltammetric scanning procedure. The resulting “stripping voltammogram” shows peaks, the heights of which are generally proportional to the concentration of the corresponding electroactive species and the potentials of which have the same qualitative meaning as their half-wave potentials in polarography. Dilute solutions in the range 10-6 to 10-9 M/dm3 and less, are analysed with excellent precision and selectivity. Thus this technique extends the range of classical polarography by three to four times making possibly the analysis in nano range. The important characteristics of stripping voltammetric peaks are its height, width and peak potential. They are affected by the type of electrodes and scan rate. The same electrode is used both in the concentration and stripping processes. The process is not disturbed by the presence of organic substances other than analyte, provided they are not adsorbed on the electrode surface.Compared with other highly sensitive electroanalytical methods such as linear-sweep oscillographic polarography and square wave or pulse polarography, stripping voltammetry gives the same performance at lower cost.

Author(s): A Mohamed Sikkandera, C Vedhib, P Manisankarc

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