A New Adsorptive Square-Wave Stripping Voltammetric Method for the Trace Analysis of Germanium

The adsorptive stripping voltammetric determination of trace amounts of germanium IV based on the adsorptiveaccumulation of the germanium IV -N- 2-hydroxyphenyl -3-hydroxysalicylaldimine complex on the hanging mercurydrop electrode is reported. The cathodic current of the adsorbed complex was measured by square wave adsorptivestripping voltammetry. The peak potential is at -0.44 V vs. Ag|AgCl|KCl sat . The effects of various parameters suchas ligand and supporting electrolyte H3PO4 concentrations, accumulation potential and deposition time wereinvestigated. After all optimization processes, the reduction peak was exploited for analytical purposes. The detectionlimit is 4.7×10-9M and coefficient of variation is 7.5%. The possible interferences in soil and biological samples bysome ions were evaluated in detail