The effect of both supporting electrolyte, acetate–acetic acid buffer at
pH 6.80 (concentrations of 0.010–0.040 mol L−1) and 0.024 mol L−1
ammonium acetate–acetic buffer at different pH values (4.0–9.0) on
the peak currentwere evaluated by analyzing acetate buffered standard
solutions containing 0.198 mg L−1 Al(III) and 7.43 mg L−1 8-HQ.