Abstract
The present study was designed to develop and validate a high-performance thin-layer chromatography (HPTLC) system for the simultaneous quantitative determination of berberine and rutin in Tinospora cordifolia extract and their pharmaceutical preparations. Chromatographic development was done using a blend of n-hexane, ethyl acetate, glacial acetic acid and methanol (10:1.1:1.1:2.5, v/v) as the mobile phase. Detection was completed densitometrically at 254 nm. The RF estimation of berberine and rutin was observed to be 0.67 ± 0.02 and 0.47 ± 0.02, respectively. The developed HPTLC method was validated according to ICH guidelines; the method was specific, linear and accurate and can be used to determine berberine and rutin in marketed herbal preparations. The Tinospora cordifolia plant extract was further evaluated for antioxidant activity using HPTLC, and berberine was found to be more active than rutin during DPPH (2,2-diphenyl-1-picrylhydrazyl) scavenging activity. The method was found simple, rapid, accurate, specific and robust for the analysis of berberine and rutin in crude drug using the same method.
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