MPAES consists of a microwave induced plasma interfaced to an atomic emission spectrophotometer (AES) and is used for simultaneous multi-analyte determination of major and minor elements. MPAES employs microwave energy to produce a plasma discharge using nitrogen supplied from a gas cylinder or extracted from ambient air, which eliminates the need for sourcing gases in remote locations or foreign countries. Light emitted as ions created by the plasma return to the ground state light is separated into a spectrum and the intensity of each emission line measured at the detector. Most commonly determined elements can be measured with a working range of low part per million (ppm) to weight percent (wt. %).