Introduce of Minoxidil as a Very Selective ligand for Ultra Trace Detection of Copper Ion by Adsorptive Stripping Voltammetric Method

A new method is presented, for the determination of copper, based on adsorptivestripping voltammetry of the complex of copper with minoxidil at a hanging mercury dropelectrode (hmde). the most suitable operating conditions and parameters, such as ph,accumulation potential, deposition time, ligand concentration and scan rate, were selected.the calibration graph for copper (ii) was linear over the concentration range of 0.5 to 700nm; the detection limit of the method was 0.09 nm. the interferences of some common ionswere studied and the method was found suitable for determination of copper (ii) in water anddrug samples. moreover, by using of the proposed method, there is a considerableimprovement in the detection limit, linear dynamic range and deposition time, compared tothe methods other than adsorptive stripping voltammetry for the determination of copper.