Trace metal analysis of rocks by flameless atomic-absorption spectrometry with a metal micro-tube atomizer

Abstract

Flameless atomic-absorption spectrometry with a metal micro-tube atomizer has been studied. The element to be determined was atomized by electrical heating of the micro-tube in an inert atmosphere within a glass chamber. A detailed study of the atomic-absorption characteristics of the micro-tube atomizer is presented. The absolute sensitivities were 2.6 × 10 −12, 2.9 × 10 −11, 2.5 × 10 −10, 1.1 × 10 −10 and 1.4 × 10 −10g for copper, cobalt, aluminium, palladium and selenium, respectively. The interferences of cations were studied for determination of cobalt and copper. Cobalt and copper in rock samples were determined in order to evaluate the metal micro- tube atomizer.