Optimization of silicate rock decomposition for determination of major elements by atomic-absorption spectrophotometry.

A rapid method for sample decomposition of silicate rocks and further accurate determination of major elements by atomic-absorption spectrometry is described. The solutions obtained were stabilized so that the measurements were comparable with those made on standard rocks solutions. Interferences were avoided. The most important methods of silicate rock decomposition were applied, and the useful characteristics from each were combined, and in some cases improved, to obtain the final procedure.