Linear ranges and detection limits for the simultaneous determination of bismuth and lead were evaluated under the selected conditions: 0.1 mol [L.sup.-1] acetic buffer (pH = 4.6), 1 x [10.sup.-4]mol [L.sup.-1] cupferron, accumulation potential -0.05 V, and accumulation time 30 s.
As it was proved in the previous procedures using HMDE as a working electrode and cupferron as a complexing agent, the organic compounds seriously suppress particularly the voltammetric signal of bismuth .
The adsorptive stripping voltammetry using cupferron as a complexing agent and renewable mercury film silver based electrode as a working electrode was successfully employed.
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