Determination of trace metals in rain water by differential-pulse stripping voltammetryDetermination of trace metals in rain water by differential-pulse stripping voltammetry
Faculty of Sciences. Chemistry
AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Analytica chimica acta. - Amsterdam
184(1986), p. 271-280
University of Antwerp
Differential-pulse stripping voltammetry is applied to measure zinc, cadmium, lead and copper by anodic stripping and selenium(IV) by cathodic stripping in rain water at pH 2; subsequently, at pH 9,1, manganese is measured by anodic stripping on the same portion, and cobalt and nickel are measured in the adsorptive mode after formation of their dimethylglyoximates. The instrumental parameters are optimized. The linear ranges, mutual interferences and detection limits are studied. Excellent accuracy is demonstrated; the standard deviation is around 15% at 2.550 μg l−1 levels. The method is shown to be applicable for rain water.