Trace zinc determination in acid media by differential pulse anodic stripping voltammetry at a hanging drop mercury electrode

1976 ◽  
Vol 48 (4) ◽  
pp. 759-761 ◽  
Author(s):  
Harry. Blutstein ◽  
Alan M. Bond
Keyword(s):  
Anodic Stripping Voltammetry ◽  
Mercury Electrode ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Drop Mercury Electrode ◽  
Hanging Drop ◽  
Acid Media ◽  
Anodic Stripping ◽  
Zinc Determination

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

1984 ◽  
Vol 49 (5) ◽  
pp. 1140-1148 ◽  
Author(s):  
Alireza Aliakbar ◽  
Milan Popl
Keyword(s):  
Heavy Metals ◽  
Anodic Stripping Voltammetry ◽  
Background Electrolyte ◽  
Mercury Electrode ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Anodic Stripping ◽  
Chemical Factors ◽  
Electrolyte Ph

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.

Determination of trace amounts of heavy metals in foodstuffs by anodic stripping voltammetry. Optimization of apparatus parameters

1984 ◽  
Vol 49 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Alireza Aliakbar ◽  
Milan Popl
Keyword(s):  
Heavy Metals ◽  
Anodic Stripping Voltammetry ◽  
Mercury Electrode ◽  
Stripping Voltammetry ◽  
Pulse Amplitude ◽  
Differential Pulse ◽  
Variable Parameters ◽  
Anodic Stripping ◽  
Two Parameters

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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