Abstract
A new method to determine manganese by voltammetry after controlled adsorptive accumulation of the manganese±
ammonium±acetate at the glassy carbon electrode is described. The manganese complex gives well-de®ned voltammetric peak
at pH 4.0 and 9.0. Cathodic stripping voltammetry combined with the Osteryoung square-wave mode at the glassy carbon
electrode gave rise to both sensitivity and selectivity of the determination of manganese in some industrial samples. The
method offers enhanced sensitivity in comparison to analogous measurements presented in the literature. The detection limit
with 5 min accumulation is 0.022 mg l
ÿ1 . Simultaneous determination of manganese in presence of Cu(II), Pb(II) and Zn(II)
could be easily done using anodic stripping voltammetry at pH 4.0. Calibration plots are constructed and the method was
checked with the aid of standard industrial reference samples giving values of standard deviations between 1.2 and 1.8.
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