Microwave-assisted sample preparation and preconcentration for ETAAS

The analytical schemes based on microwave pretreatment (including decomposition of samples and sorption extraction of trace elements, carried out either in static conditions or in a Bow), followed by the determination of microcomponents with atomic spectroscopy methods, are described. The schemes have been developed for the analysis of geological, technological, biological and environmental samples on noble and heavy metals. Results obtained, as well as main features and benefits of microwave-assisted sample preparation coupled with instrumental determination, in part, electrothermal atomic absorption spectrometry, are discussed. (C) 1997 Elsevier Science B.V.