Analytical chemistry is a branch of chemistry which is an important tier of environmental protection and has been traditionally linked to compliance and/or exposure monitoring activities for environmental contaminants. Chemical analyses can be qualitative, as in the identification of the chemical components in a sample, or quantitative, as in the determination of the amount of a certain component in the sample. Namely, methods developed for regulated contaminants may not be appropriate and/or applicable to risk management scenarios. The underlying foundations of diagnostic science and a portion of the standards utilized as a part of current instruments are from conventional systems. Traditional technique subdivided into two strategies: the subjective and the quantitative strategy for examination.