matrices

The main purpose of this review is to highlight the importance of colorimetric approaches to drug analysis both in dosage forms as well as biological samples. Colorimetric methods using colorimetric reagents are highly sensitive, specific and an easy way of determining various analytes in a variety of matrices within a short time. The colorimetric procedures discussed are statistically validated and reported in various quality control laboratories. Hence in the present review significance of colorimetric procedures, various reagents used along with principles and applications are mentioned. Key words: Colorimetric approaches, sensitive, matrices, quality control, applications.