The conditions for identification and quantilication of Pb(II) and Cd(II) ions as impurities in homeopathic preparations by stripping voltammetry were established. The tests proved that the method was of high selectivity. The detection limits were 0.78 ng/mL and 1.56 ng/mL for Pb(II) and Cd(II) ions, respectively. The method was characterised by: repeatability of measurements, a wide range of linearity and satisfactory percent recovery. The Pb(II) and Cd(II) ions were detected in examined drugs as impurities at concentrations of 1.23 ? 9.5 ng/mL and 1.66 ? 3.7 ng/mL for Pb(II) and Cd(II), accordingly.
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