Application of Chemometrics for the simultaneous estimation of stigmasterol and β-sitosterol in Manasamitra Vatakam-An ayurvedic herbomineral formulation using HPLC-PDA method
A new research method has been developed to approach multiresponse optimization for simultaneously optimizing a large number of experimental factors. LC Chromatogram was optimized using Phenomenex RP C18 column (250 x 4.6mm; 5µm); mobile phase was surged at isocratic mode with a flow of 1.0 mL/min using methanol and acetonitrile (95: 5 % v/v) at the detection max of 208 nm with the retention time of 16.3 and 18.1 min for Stigmasterol and β-Sitosterol respectively. Amount of Stigmasterol and β-Sitosterol was quantified and found to be 51.0 and 56.3 µg/mg respectively. The r2 value of 0.9971 and 0.9960 was found in the linear range of 80-130 µg/mL for Stigmasterol and β-Sitosterol respectively. LOD and LOQ were 6.951, 21.063 µg/mL and 6.048, 18.328 µg/mL for Stigmasterol and β-Sitosterol respectively. The relative standard deviation for the system and the method precision were found to be 0.94%, 0.40 % and 1.51%, 1.1% (≤ 2%) for stigmasterol and β-Sitosterol. Recovery studies were performed and found in the range of 95-105% indicates the accuracy of the developed method. The developed chromatographic method is the first report for the concurrent estimation of Stigmasterol and β-Sitosterol in Manasamitra Vatakam.
Key words: Chemometrics, Manasamitra vatakam, RP HPLC, Stigmasterol, β-sitosterol
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