Collect. Czech. Chem. Commun. 1984, 49, 1140-1148

The determination of trace amounts of heavy metals in foodstaffs by anodic stripping voltammetry: Optimization of chemical factors

Alireza Aliakbar and Milan Popl

Department of Analytical Chemistry, Prague Institute of Chemical Technology 166 28 Prague 6


A study was made of the use of differential pulse anodic stripping voltammetry (DPASV) for the determination of heavy metals (Cd, Pb, Cu) in foodstaffs. A thin-film mercury electrode was used for preconcentration from solution and dissolution. After prior optimization of the instrumental parameters, the effect of the following chemical factors was studied: concentration of mercury(II) ions, electrolysis (enrichment) time and the pH of the background electrolyte. It was found that all three factors affect the sensitivity of the determination of Cd and Pb, while only the electrolysis time and electrolyte pH are important for Cu. All three factors were optimized by the simplex method. The dependence between the concentration and the peak dissolution current was measured for all three metals and the detection and determination limits were found.