Anodic adsorptive stripping voltammetry of the antihypertensive drug candesartan cilexetil at a glassy carbon electrode.
The electrochemical behaviour of candesartan cilexetil (CND) was investigated in an acetonitrile: supporting electrolyte mixture (30% acetonitrile) in the pH range 1.5-11.00 by cyclic, linear sweep, differential pulse (DPV), adsorptive stripping differential pulse (AdSDPV), square wave (SWV) and adsorptive stripping square wave (AdSSWV) voltammetric techniques. CND exhibited one wave and one peak to the anodic direction. The oxidation process was found to be irreversible and adsorption controlled. To obtain good sensitivity, the instrumental and accumulation variables were studied using DPV and SWV techniques. Two linear calibration plots were obtained for both techniques. The detection limits were 9.15 x 10(-7) M and 7.94 x 10(-6) M for AdSDPV and AdSSWV, respectively. The method was validated and successfully applied for the analysis of CND tablets.
Dogan
B
B
Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Tandogan-Ankara, Turkey.
Uslu
B
B
Ozkan
S A
SA
D000959:Antihypertensive Agents / Q000737:chemistry*; D001562:Benzimidazoles / Q000737:chemistry*; D001713:Biphenyl Compounds / Q000737:chemistry*; D002244:Carbon; D004563:Electrochemistry; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D010084:Oxidation-Reduction; D015203:Reproducibility of Results; D013607:Tablets; D013777:Tetrazoles / Q000737:chemistry*
D000959:Antihypertensive Agents; D001562:Benzimidazoles; D001713:Biphenyl Compounds; D007202:Indicators and Reagents; D013607:Tablets; D013777:Tetrazoles; D002244:Carbon; C077793:candesartan cilexetil