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Microwave assisted extraction of ursolic acid and oleanolic acid from Ocimum sanctum

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Abstract

Present study deals with the microwave assisted extraction (MAE) of ursolic acid (UA) and oleanolic acid (OA) from Ocimum sanctum leaves. UA and OA have been reported to possess significant medicinal properties. Various experimental parameters such as selection of solvent, solvent composition, irradiation time, microwave power, solid to solvent ratio, preleaching time and number of cycles were investigated to optimize the extraction process. Under optimum conditions of irradiation time (3 min), microwave power (272 W), solid to solvent ratio (1:30), preleaching time (10 min), maximum UA and OA has been extracted in one extraction cycle with ethanol: water (80:20) as a solvent. Maximum 86.76 and 89.64% of UA and OA was extracted under above mentioned optimized experimental conditions. MAE was also compared with the batch and ultrasound assisted extraction (UAE) method. As compared to batch and UAE, higher extraction yield of these important phytochemicals have been obtained through MAE in only 3 min.

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Correspondence to Virendra K. Rathod.

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Vetal, M.D., Chavan, R.S. & Rathod, V.K. Microwave assisted extraction of ursolic acid and oleanolic acid from Ocimum sanctum . Biotechnol Bioproc E 19, 720–726 (2014). https://doi.org/10.1007/s12257-013-0798-y

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  • DOI: https://doi.org/10.1007/s12257-013-0798-y

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