Abstract
The paper describes the use of inductively coupled argon plasma (ICAP) atomic emission spectroscopy in the analysis of nitric acid extracts of stream sediment samples. The extracts can vary widely in composition, especially for the elements Fe, Al, Ca, Mg and Mn. Matrix effect investigations are therefore important and constitute a part of this work. The use of reference elements is studied and shown to be of significance for improving analytical precision. A method for the simultaneous determination of 20 elements using Li and Y as reference elements is described. Results obtained by the method on synthetic test samples and on real samples analyzed by independent methods are reported.
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