Effect of Various Cations and Anions on the Reduction of Molybdenum (VI) at D.M.E. and its Determination in their Presence

In earlier publication1, the authors have reported data on the polarographic behaviour of molybdenum(VI) in three different organic acid media viz. mandelic acid, succinic acid and formic acid — sodium formate and concluded that in medium comprised of 0.1 M mandelic acid, 0.005% thymol and 0.1% camphor Mo(VI) produces a well defined irreversible diffusion controlled doublet wave, the total height of which varies linearly with Mo(VI) concentration. In view of the difficulties associated with the polarographic determination of Mo(VI) because of the lack of appropriate supporting electrolytes in which the waves are well formed with diffusion current proportional to concentration and due to the occurrence of analytically useful wave in mandelic acid medium it was considered worthwhile to investigate the effect of the presence of various cations and anions on the Mo(VI) wave and the possibility of its determination in their presence. The present communication, therefore, describes data on the effect of the presence of Ni2®, Co2®, W O42®, VO30, Cr20 72©, Mn2®, Te042e, Fe3®, Ti2®, C104®, N 03®, on the wave produced by molybdenum(VI).