Direct graphite furnace atomic absorption spectrometric determination of metals in seawater: application of palladium modifiers and a fractal approach to their analytical support

To eliminate seawater interferences with metal determinations by GF-AAS, a new mixed modifier system of ammonium oxalate and tetraamminepalladium(II) chloride was added. These modifiers optimized the direct GFAAS determination of lead and manganese but, for cadmium, only ammonium oxalate was require...

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Bibliographic Details
Published in:Analytica chimica acta 1993-01, Vol.279 (2), p.241-251
Main Authors: Sachsenberg, S, Klenke, T, Krumbein, W E, Schellnhuber, HJ, Zeeck, E
Format: Article
Language:English
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Summary:To eliminate seawater interferences with metal determinations by GF-AAS, a new mixed modifier system of ammonium oxalate and tetraamminepalladium(II) chloride was added. These modifiers optimized the direct GFAAS determination of lead and manganese but, for cadmium, only ammonium oxalate was required as modifier. To detect possible stabilizing effects of palladium on the analytes, a fractal approach to the surface geometry of the palladium-conditioned graphite platform was used. Fractal characteristics of the palladium elemental distribution were ascertained by a scanning electron microscope-energy dispersive X-ray spectrometer image box-counting analysis technique. Differences in the structure of palladium deposits on the platform which affected some analytes to a small extent are indicated.
ISSN:0003-2670