applications.

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.

HPLC is the dominant separation technique in modern pharmaceutical and biomedical analysis because it results in highly efficient separations and in most cases provides high detection sensitivity. Most of the drugs in multi component dosage forms can be analyzed by HPLC method because of the several advantages like rapidity, specificity, accuracy, precision and ease of automation in this method. HPLC methods development and validation play important roles in new discovery, development, manufacture of pharmaceutical drugs and various other studies related to humans and animals. It is the most versatile, safest, dependable and fastest chromatographic technique for the quality control of drug components. This article was prepared with an aim to review different aspects of HPLC, such as principle, types, instrumentation, validation of HPLC and application. 

Unique properties of Nanofibers have attracted for the designing of controlled drug delivery systems due to high surface area to volume ratio, porosity so only we can applied in advance application such as Biodegradable and controlled drug delivery systems. The benefits of the fibrous carriers are site specific delivery of drugs to the body. Nanofibers are an exciting new class of material produced using an innovative manufacturing process technology. These fibers are produced from a variety of polymers in geometrical shapes ranging from Nonwoven web, yarn, and bulk structures. The Synthetic polymer Nanofibers are made from Nylon, Acrylic, Polycarbonate, Polysulfones, and Fluro polymers among other polymers. The biological polymer nanofibers are made from materials such as Polycaprolactum, Chitosan, Polylactic acid, and Copolymer of Polylactic/glycolic acid among other biopolymers. At present, there are three techniques available for the synthesis of Nanofibers: Electro spinning, self-assembly, and phase separation, out of these Electro spinning is the most widely used technique. Mostly , the bioactive molecules like anti-cancer drugs, enzymes. Cytokines, and polysaccharides can be entrapped within the interior or physically immobilized on the surfaces of nanofiber for controlled drug delivery. The advanced approach for creating Nanofibers made of proteins developed, greatly improve drug delivery methods for the treatment of cancers, heart, and Alzheimer’s diseases, as well as aid in the regeneration of human tissue, bone and cartilage. This review paper reports on fabrication of nanofibers and its characteristics and high tech application in drug delivery, tissue engineering and filter medium.