A Microanalytical Method for the Analysis of Gold in Biological Media by Flameless Atomic Absorption Spectroscopy

摘要

A simple and sensitive method is presented for the determination of gold in various biological matrices by flameless atomic absorption spectrometry (FAAS). The effects of the biological media on the atomic absorption of gold and the application of some of the important fundamental principles in relation to the measurement of the analyte are also discussed. The results demonstrate that, in FAAS analysis, to obtain maximum peak height sensitivity the samples must be confined to the centre of the graphite atomiser, and for accurate background correction the light paths of the analyte and the continuum lamps through the atomised sample must be synchronised. For measurement of gold in the presence of sodium chloride, the concentration of the salt in the gold standards and the samples must be matched to neutralise the severe depression of the gold signal by sodium.