The actual quantitative facets of atomic spectroscopy have been formulated merely within the past 60-70 years. The substitution of photoelectric devices pertaining to visual detection and also the advancement and commercialisation of equipment go back to the later part of 1930s. The creation of all these devices was made feasible not simply owing to continued advancement in the understanding of the principle makeup and behaviour of atoms but have also been reinforced by the growing realisation that the existence of minimal and trace quantities (low mg/kg) of specific elements can impact industrial processes substantially. Consequently, devices had been developed in response to technical and technological demands. Contemporary atomic spectroscopy could very well be divided ideally into 3 connected techniques based on the processes employed to generate, to be able to detect as well as determine the free atoms of analyte. While atomic absorption spectrometry (AAS) calculates the amount of light absorbed by atoms of analyte, atomic emission and atomic fluorescence determine the amount of the radiation emitted by analyte atoms (although under distinct conditions) that have been promoted to increased energy levels (excited states). Atomic emission (AE) and atomic fluorescence (AF) vary basically in the procedures through which analyte atoms obtain the extra energy associated with their excited states; perhaps by means of collisional events (AE) or through the absorption of radiant energy (AF). Every one of these 3 spectroscopic techniques can certainly be classified as a trace technique (meaning both a higher level of sensitivity and also a high selectivity), can be pertinent to numerous elements, and yet relative to the other two, every individual technique presents specific benefits as well as drawbacks.