A sensitive and selective voltammetric methods has been developed for the determination of trace amounts of Mo(VI) ions. This method is
based on controlled adsorptive preconcentration of molybdenum species on the hanging mercury drop electrode (HMDE) using mixtures of
nitrate and phosphate as supporting electrolytes. The adsorptive stripping response was evaluated with respect to preconcentration time,
potential and composition of supporting electrolyte. The method used is cathodic linear sweep stripping voltammetry (CLSSV). The
detection limit found was 161078M using 120 s. as accumulation time. The precision of the method is satisfactory with relative standard
deviation of 1.4% with ®ve replicates at 161076M Mo(VI). The effect of various surface active substances (SAS) as well as different
metal cations and anions in synthetic aqueous solutions has been investigated. Also this method has been applied for the determination of
Mo(VI) in environmental samples; e.g., soil, natural water and indoor airborne particulate.