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.