Principle:
In emission spectroscopy thermal energy in the form of plasma is used to excite free atoms as well as in some cases ions to higher energy levels. The atoms or ions will subsequently emit the characteristic radiation that can be isolated by monochromator and detected by the detector (photmultiplier tube). The intensity of emitted radiation is proportional to the concentration of atoms or ions present in the sample.

Applications:
The techniques is applicable to elemental impurities analysis in, Geological , Biological samples like urine, blood, plants etc. and environmental samples. Analysis of trace metal impurities from Inorganic/Organic / Polymer / Glass/ Ceramic/Geological sample/ Biological samples up to ppm level.

Detection Limits:
Most of the elements can be detected in ppm and some of the elements in ppb level as well.