Adsorption of zinc on polymeric chelating adsorbents in the analysis of natural water

The physicochemical and analytical properties of polymeric chelating adsorbents, polystyrene-2-hydroxy-(1-azo-1′)-2′-hydroxybenzene derivatives, to zinc ions were studied. A possible chemical mechanism of the complexation process was based by a number of parameters. A procedure was proposed for the preconcentration of zinc followed by its stripping voltammetric determination in natural water. The detection limit of the proposed procedure (0.1 μg/L) ensures reliable ecological control of natural waters; the relative standard deviation was 1–4% at a concentration level of n × 10−5%.