ABSTRACT
Sample decomposition is the first step after pulverization in the procedure of geochemical analysis. Its aim is to convert the solid sample into a solution suitable for elemental determination by modern atomic spectrometry or other instrumental methods. The complexity of geological materials makes it necessary to choose a sample decomposition technique that is compatible with the specific objective of the analysis. When selecting a decomposition technique, consideration should be given to the chemical and mineralogical characteristics of the sample, the elements to be determined, the requirement for precision and accuracy, sample throughput, the technical capability of the personnel, and the constraints of time [17].
