IMPROVED ET-AAS DETERMINATION OF ALKALINE AND EARTH ALKALINE ELEMENTS WITH A SIMPLE LOW-COST TUNGSTEN COIL ATOMIZER

The ET-AAS determination of elements which form hardly atomizing carbides or oxides and of elements with resonance lines in the visible part of the spectrum, e.g. alkaline and earth alkaline elements, was studied using the tungsten coil atomizer; the detection limits were between 0.02 and 1.6 ng/ml. The advantages of the new atomizer are illustrated by the determination of Ba, Ca and Mg traces in ammonium paratungstate, which, as a carbide-forming matrix, is less suitable for the analysis with conventional AAS techniques. © 1990 Springer-Verlag.