Abstract
The use of differential pulse anodic stripping voltammetry in the determination of heavy metals (Cd, Pb, Cu, As) in foodstuffs was studied. Preconcentrating from solutions and dissolution took place on a thin film mercury electrode. A factorial experiment served to determine the effects of variable parameters of the apparatus, a polarographic analyzer: pulse amplitude, pulse period, and potential scan of the working electrode during dissolution. The first two parameters are significant but the scan rate is not. The apparatus parameters were optimized further by the method of response surface fitting near optimum.
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