Atomic-fluorescence and atomic-absorption spectrometry for chemical analysis

Abstract

Atomic-absorption spectroscopy, which was first described in the literature in 1955, has now become widely accepted as a trace technique for the analysis of most metals. However, atomic fluorescence, which was first described in 1964, has not yet found widespread use. This situation is analysed and some aspects of the relative performance and properties of the two techniques are discussed. Particular attention is paid to the type of excitation source and atomising device. The effects that recent developments may have on the relative importance and use of these techniques are assessed.

Attention is focused on a new analytical possibility in which hydrated atomic species are generated by electro-reduction in the solution phase above a cathode and in which the optical ultraviolet absorption and fluorescence spectra of these hydrated atom species are measured.