4. Conclusions
An alternative method is developed using Clioquinol for the determination of trace amounts of lead, cadmium and zinc in one run by adsorptive stripping voltammetry. In the analyzed water samples the concentration of cadmium is too low. The sensitivity can be increased by choosing only the optimum experimental conditions for this element, such as higher CQ concentration and longer tads. The proposed method is more sensitive than atomic absorption spectrometry and inductively coupled plasma with emission spectrometry. The resolution between the signals of the complexes was optimum.