Simultaneous Determination of Copper, Lead, and Cadmium at Hexagonal Mesoporous Silica Immobilized Quercetin Modified Carbon Paste Electrode
Figure 4
Effect of pH (4.0–6.0) on peak current at HMS-Qu/CPE in 1.0 M (each) multicomponent Cu(II)/Pb(II)/Cd(II) solution and 0.1 M HCOONa-HCl buffers. Condition: preconcentration potential 0.6 V, preconcentration time 120 s, potential scan range 0.6 V to V.