Soils and sedimentary rocks analysis shows important data of chemical, geochemical and ecological studies. Concentration of chemical elements in minerals or soil is critically important to understand the nutrition of plants and soil-forming processes. For environmental control, the analysis of toxic elements is very important because one can study the sources and processes of chemical soil contamination.

Soil or Geochem modes allow pXRF guns to perform efficient quantitative or semi-quantitative chemical analysis of minerals (rocks) or soils with a minimum of sample preparation.