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Determination of cadmium, copper and lead in natural waters after anion-exchange separtion.
Authors:J Korkisch  A Sorio
Institution:Research Institute for Technical Physics of the Hungarian Academy of Sciences, Ujpest I.P.O. Box 76, 1325 Budapest Hungary
Abstract:A method is described for the determination of cadmium, copper and lead in samples of natural non-saline waters. After acidification with hydrobromic acid, the water sample is filtered and, following the addition of ascorbic acid, passed through a column of the strongly basic anion-exchange resin Dowex 1-X8 (bromide form). On this exchanger cadmium(II). copper(I) and lead(II) are adsorbed as anionic bromide complexes. After elution of these elements with 1 M nitric acid, the determinations by atomic absorption spectrometry are carried out in a medium consisting of 90% (vv) methanol and 10% (vv) 1.5 M hydrobromic acid. The procedure was used for the routine determination of cadmium, copper and lead in water samples collected in Austria.
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