The SEM based PGT Imix Energy Dispersive Spectroscopy (EDS) provides elemental detection and quantitative measurement (lower limits < 1%) of elements heavier than beryllium in the Periodic Table (link courtesy of ARS).    Contamination, alloy phase distribution or construction composition is imaged across the surface of a sample using elemental dot mapping.                       For organic materials, such as plastics, hydrocarbons, contamination, Fourier Transform Infrared  (FTIR) analysis complements EDS analysis.