The voltammetric behavior of the catalytic reduction of perborate at carbon paste electrodes modified with Prussian blue is compared with that of hydrogen peroxide. Good linearity is observed between the voltammetric current and the concentration from 1 to 100 ppm H202 as perborate. The influence of the paste composition and other variables is studied. 1040-0397/90/$3 50 + 25 \ 200.c,
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