Development and validation of green chemistry HPLC-RI method for the simultaneous estimation of glucosamine and chondroitin sulfate from drug products

Abstract

Design and development of analytical methods with environment friendly reagents and solvents is the need of the hour for labs engaged in analytical services. Every year thousands of chemical and pharmaceutical laboratories worldwide are generating tons of toxic chemical wastage causing environmental pollution thereby endangering the human existence. The objective of this study was to develop and validate a sensitive, stability-indicating, accurate and precise green chemistry RP-HPLC method with RI detector for the simultaneous quantitation of glucosamine and chondroitin sulfate from various pharmaceutical dosage forms. Complete separation of both the actives was achieved in isocratic mode by using Hypersil BDS Phenyl (250 x 4.6 mm, 5µm) HPLC column. Purified water as a diluent and phosphoric acid buffer pH 2.5 was used as a mobile phase at a flow rate of 0.2 mL/min. The column temperature was maintained at 40°C. Both the molecules being non-chromophoric in nature, refractive index (RI) detector was used for detection. The proposed method being environment friendly does not require organic solvents, gradient elution and complex derivatization unlike the reported methods. The developed method is successfully validated as per ICH guidelines. The method is stability indicating, sensitive and economical. Hence, it can be successfully used for the routine analysis of commercial batches of these combination products.