The Rigaku EDXRF product line is introduced and the NEX CG is featured using indirect excitation. The basic ideas of direct and indirect excitation for optimum excitation and background removal are reviewed. Rigaku innovation brings NEX CG to the forefront of EDXRF analysis using full 90° Cartesian geometry and polarization, allowing pure monochromatic excitation with virtually all background removed. This allows for optimum use of Fundamental Parameters without the need for any reference materials. Rigaku's unique Scattering FP determines the complex balance of the material that cannot be measured directly by X-rays. Cartesian geometry indirect excitation together with Rigaku Scattering FP makes NEX CG ideal for the optimum measurement of complex applications where the base matrix can vary substantially, such as animal feeds, soils and the analysis of nutrient uptake in plant materials.