Trace amounts of Ge (IV) can be determined by adsorptive stripping voltammetry in the presence of N-(2-hydroxyphenyl)-3,4-dihydroxybenzaldimine. The reduction current of the Ge (IV)-N-(2-hydroxyphenyl)-3,4-dihydroxybenzadimine complex was measured by square-wave adsorptive stripping voltammetry. The peak potential was at -0.436 mV vs. Ag/AgCl (saturated KCI). The effects of concentration of the ligand, composition of the supporting electrolyte, accumulation potential and collection time are discussed. The working linear range as established by a regression analysis extends from 1.01 x 10(-10) to 2.52 x 10(-9) M. The detection limit of the method is was 2.11 x 10(-10) M. Possible interferences are examined and evaluated. The proposed method is successfully applied for the determination of Ge (IV) in synthetic sphalerite sample. The adsorptive properties of N-(2-hydroxyphenyl)-3,4-dihydroxybenzaldimine and its complex with Ge (IV) were investigated and a mechanism for the electrode processes is proposed.