[en] 'Analytical chemistry' or simply 'chemical analysis' is understood as that which encompasses any examination of a material, with the goal of eliciting information regarding its constituents. Information can be about the form, quality, pattern of chemical bonding, contents and concentrations, homogeneity, distribution with respect to internal and external boundary surfaces, spatial arrangements of atoms and molecules etc. This goal is pursued using an appropriate combination of chemical, physical and biological methods. Elemental analysis means, the determination of essentially all the elements present in a sample, irrespective of the types of bonding involved or the constituents of the matrix. The present discussion is restricted to sample preparation and analysis, using Inductively Coupled Plasma Mass Spectrometer (ICP-MS) and Gas Chromatography Mass Spectrometer (GC MS)