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Simultaneous determination of 4 alkaloids and a flavonoid in
Picrasmae Ramulus et Folium by RP-HPLC
WU Chong, DENG Gui-hua, LIN Chao-zhan*, ZHU Chen-chen*
(Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510405, China)
[Abstract] A RP-HPLC method was developed to evaluate the quality of Picrasmae Ramulus et Folium by simultaneous determination of five constituents including 1-hydroxymethyl-β-carboline(1), 1-methoxicabony-β-carboline(2), 4-methoxy-5-hydroxy-canthin-6-one(3), 4, 5-dimethoxy-canthin-6-one(4) and maackiain(5) in Picrasmae Ramulus et Folium.The samples were separated on a Kromasil RP-C18(4.6 mm×250 mm, 5 μm) column eluted with acetonitrile and 0.1% phosphoric acid as mobile phases in gradient mode. The detection wavelength was set at 254 nm.The calibration curves and linearity of the above five standards were determined as(1) Y=6 525.6X+37.25(0.009-1.780 μg, r=0.996 8),(2) Y=3 662.3X+41.55(0.005-0.920 μg, r=0.999 5),(3) Y=3 763.1X+146.87(0.015-3.060 μg, r=0.999 0), (4) Y=2 174.1X+21.52(0.003-0.620 μg, r=0.999 5), and(5) Y=276.25X+7.65(0.010-1.960 μg ,r=0.998 9), respectively. The method is simple and repeatable, and can be used for the quality assessment of Picrasmae Ramulus et Folium.
[Key words] Picrasmae Ramulus et Folium; β-caboline; canthin-6-one; macckiain; RP-HPLC
doi:10.4268/cjcmm20140922