Electron Probe Micro Analysis (EPMA) uses standards for highly accurate probe analyses at high magnification for exploration, economic geology, applied mineralogy, process mineralogy, applied microscopy, and mineral analysis.

Raw (unpolished) sample, powders, polished thin sections (1″ x 1-1/2″ x 30 um), and polished sections (1″ diameter) are typical sample inputs for EPMA microprobe analyses.