A Simple, Fast, and Inexpensive Simultaneous Determination of Trace Bismuth(III) and Lead(II) in Water Samples by Adsorptive Stripping Voltammetry

Figure 5

Differential pulse voltammograms obtained in the course of the Bi(III) and Pb(II) determination in Lake Zemborzyce water: (a) Lake Zemborzyce water diluted two times; (b) as (a) + 1 × 10⁻⁸ mol L⁻¹ Bi(III) and Pb(II); (c) as (a) + 2 × 10⁻⁸ mol L⁻¹ Bi(III) and Pb(II); (d) as (a) + 4 × 10⁻⁸ mol L⁻¹ Bi(III) and Pb(II). Concentration of cupferron 1 × 10⁻⁴ mol L⁻¹ and acetate buffer 0.1 mol L⁻¹ (pH = 4.5). Accumulation potential −0.05 V and accumulation time 30 s.