Analytical chemistry is the study of obtaining, processing, and communicating information about the composition and structure of matter and uses instruments and methods used to separate, identify, and quantify matter. separation, identification or quantification are combined with another method which are in practice for whole analysis. Analytical chemistry consists of classical, wet chemical methods and modern, instrumental methods of identification are based on differences in color, odor, melting point, boiling point, radioactivity or reactivity. Instrumental methods can use to separate samples using chromatography, electrophoresis or field flow fractionation. Analytical chemistry is also focused on improvements in experimental design, chemometrics, and the creation of new measurement tools. It is used in various applications of forensics, medicine, science and engineering.