Spectroscopy technique is based on light interacting with the components. When a light rays impact compound, some part absorbing and remaining is reflected. Light is an electromagnetic radiation and moves the atoms of sample from one energy state to another by absorption or emitting of light. The light wavelength range used in spectroscopy varies from infra-red (IR), visible and ultra-violet (UV). There is a wide range of analyzing methods based on this technique which are suitable for both qualitative and quantitative analysis of samples. Elemental analysis is referring to the methods for determination of elemental composition and quantification in a sample.

- Atomic Absorption Spectroscopy (AAS)

- Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES)

- X-ray fluorescence Spectroscopy (XRF) 

- Optical emission spectroscopy (OES)

- Ultraviolet-Visible Spectrophotometry (UV-Vis)

- Fluorescence spectroscopy (FLR)

- Fourier Transform Infrared Spectroscopy (FTIR)