Abstract
The article presents the methods used in the analysis of geological samples for determining quantitatively elements. The two parameters, reiteration and accuracy are calculated by data of experimental analysis realized in the Centre of Analysis and Experimentation of the Geological Mapping Division of South Việt Nam for comparing the quality of equipments. Some statistics on the tendency of selection of analytic methods by laboratories on the world have been touched upon. From this, the update of analytic methods and modern equipments in the Geological Branch is necessary and conformable to the situation on the world.