Microwave-assisted extraction for the determination of shanzhiside methyl ester and barlerin in Barleria prionitis L.

The study focused on the application of microwave-assisted extraction (MAE) to determine the presence of Shanzhiside Methyl Ester (SME) and Barlerin (BLR) in Barleria prionitis L. (B. prionitis L.) The impact of the extraction parameters, including solvent concentration, microwave power, and duration of extraction. The findings of the current investigation reveal that the solvent concentrations of 90% and 70% ethanol produced significant yields of SME and BLR, measuring at 4% and 0.5%, respectively. The power of microwave irradiation ranges from 100 W to 600 W. Notably, at 600 W, the extraction efficiencies of SME and BLR match those observed at 450 W. Therefore, we opted for a microwave irradiation power of 450 W for the extraction of B. prionitis L. The findings demonstrated that the yield of SME and BLR rose with the extension of MAE time during the initial phase of extraction. The yield may attain a peak of 4% within 5 minutes during the MAE process. Consequently, a duration of 5 minutes was selected as the ideal timeframe for MAE to achieve the maximum yield.