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1.
Chinese Journal of Biochemical Pharmaceutics ; (6): 161-163, 2014.
Artículo en Chino | WPRIM | ID: wpr-454142

RESUMEN

Objective To optimize the extraction process of Euphorbia hirta L.by Central composite design/response surface methodology with ethanol by the ultrasonic extraction technology.Methods Based on the single factor experiment and central composite design-response surface methodology,the content of quercitroside was regarded as evaluation index,select ethanol concentration,extraction time,and solid-liquid ratio as three evaluation factors to achieve the purpose. Results The results indicated that the optimal extraction process was obtained as follows:10 times the amount of 60% ethanol under ultrasound for 2 times,50 min each;the average content of the quercitroside was 2.39 mg/g.Conclusion The method to optimize the extraction process is simple and reasonable.

2.
International Journal of Traditional Chinese Medicine ; (6): 46-48, 2013.
Artículo en Chino | WPRIM | ID: wpr-431597

RESUMEN

Objective To establish the RP-HPLC method for the determination of myricetrin and quercitroside in Euphorbia Hirta L.Methods The ZORBAX SB-C18 (250 mm × 4.6 mm,5 μn) column was used,the mobile phase consisted of acetonitrile:0.1% H3PO4(21 ∶ 79),the flow rate was 0.8 ml/min,the column temperature was 30℃ the detecting wavelength was at 256 nm.Results The cablibration curve was linear within a range of 0.013~0.26 mg/ml and 0.008~0.16 mg/ml,the average recovery was 99.1%,98.9%and the RSD was 0.91%,1.55%,respectively.Conclusion The method is simple,repeatable and accurate,it can be applied in quantitative determination of myricetrin and quercitroside in Euphorbia Hirta L..

3.
International Journal of Traditional Chinese Medicine ; (6): 613-615, 2013.
Artículo en Chino | WPRIM | ID: wpr-435339

RESUMEN

Objective To establish the RP-HPLC method for the determination of myricetrin and quercitroside in Polygonum aviculare L.Methods The Agilent LC-C18 (250 mm×4.6 mm,5 μm) column was used,the mobile phase consisted of acetonitrile:0.1% H3PO4(18 ∶ 82),the flow rate was 1.0 ml/min,the column temperature was 30℃ the detecting wavelength was at 256 nm.Results The calibration curve was linear within a range of 1.22~24.30 μg/ml and 0.77~15.40 μg/ml,the average recovery of this method was 98.9%,99.6% and the RSD was 1.11%,1.09%,for the myricetrin and quercitroside respectively.Conclusion The method is simple,repeatable and accurate.It can be applied in quantitative determination of myricetrin and quercitroside in Polygonum aviculare L..

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