‘Analysis’ means the detailed examination, which reveals the minor but important aspects regarding to the drug. Analytical study of a product provides some standards to judge its quality. It is useful to decide future work plan and objective parameters to know the accurate status of drug by conducting the comparative study of various samples during drug preparation. Excellence of any product is established not merely by the external appearance of the drugs, but also it has to pass with critical analysis in drug testing laboratory. The drug has to be passed through certain characteristics like the potency, uniformity, purity, stability etc. in order to attain its acceptance. The quality of a dosage form should not only be tested at the end but must built into the product right from the moment of receipt of raw materials through processing until the final packaging. Physico-chemical analysis provides the objective parameters to improvise the standards for quality of raw drugs as well as finished products.
