Simultaneous determination of the four effective components in Huaijiao pill by HPLC / 中国中药杂志

<p><b>OBJECTIVE</b>To develop an HPLC method for determination of the four effective components (genistin; rutin; quercetin; genistein) in Huaijiao pill.</p><p><b>METHOD</b>The chromatographic separation was performed on a Shim-packODS (4.6 mm x 150 mm, 5.0 microm) eluted with a mobile phase of MeOH-H2O-HAc (40:60:0.25). The detection wavelength was set at 256 nm and column temperature was set at 30 degrees C .</p><p><b>RESULT</b>Nice linear relation between the peak area and injected amount exists when the amount is within 0.059-0.352 microg for genistin, within 0.435-2.610 microg for rutin, within 0.020-0.121 microg for quercetin and within 0.053-0.319 microg for genistein. The correlation coefficient of each component is 0.999 6, 0.998 2, 0.998 9 and 0.999 9 respectively. The average recoveries of the four components are from 98.7% to 100.2%. The RSD of each group are 1.21%, 1.36%, 0.47% and 1.54% (n = 5).</p><p><b>CONCLUSION</b>The method was accurate, repeatable and suitable to determine four effective components in Huaijiao pill. It can be use for quality control of Huaijiao pill.</p>

Study of the methods of determining the isoflavones in herbs of Trifolium pratense extractive / 中国中药杂志

<p><b>OBJECTIVE</b>To study the methods of determining the amount of Isoflavones in red clover extractive.</p><p><b>METHOD</b>RP-HPLC is employed to determine the Isoflavones, with a C18 RP Column, a moble phase of MeOH-CH3CN-0.1%H3PO4 and a detection wavelength of 260 nm.</p><p><b>RESULT</b>After being water-solved, the four groups of flavoes elements satisfactorily separated, the amount of feeding in a range of 0.024-0.336 microg which has a good linear relationship with the peaks, and the total isoflavones determining results repetition, RSD=10.1%.</p><p><b>CONCLUSION</b>A simple, reliable and effective quality-control method is given.</p>