**4.3 Ion chromatographic and voltammetric determination of heavy metals in soils. Comparison with atomic emission spectroscopy**

The aim is to compare different analytical techniques, aspectroscopic, an electrochemical and a chromatographicone to determine total heavy metals concentrations in soils and to establish a correlation between these three techniques even though soil solutions are complex matrices providing a lot of interference problems [107]. Atomic emission spectroscopy is the method of reference for heavy metals concentrations analysis.
