Simultaneous determination of geniposide, baicalin and berberine hydrochloride in Angong Niuhuang pill by RP-HPLC / 中国中药杂志

ABSTRACT

<p><b>OBJECTIVE</b>A new method for the simultaneous quantitative determination of geniposide, baicalin and berberine hydrochloride in Angong Niuhuang pill using reversed phase high performance liquid chromatographic method had been developed.</p><p><b>METHOD</b>The optimum chromatographic conditions were as follows Agilent Zorbax SB - C18 column (4.6 mm 250 mm, 5 m), acetonitrile-H2O (containing 6 mmol L(-1) KH2PO4, pH 4.6) gradient elution; as a detection wavelength of 343 nm.</p><p><b>RESULT</b>The calibration curves of geniposide, baicalin and berberine were linear at the ranges of 4.50-110.00, 5.00-153.00, 6.40-191.00 mg L(-1), respectively. The limits of detection of the method were 0.77 ng for geniposide, 1.53 ng for baicalin and 1.43 ng for berberine hydrochloride. The recoveries of the method were 104.44% (RSD 1.79% ) for geniposide, 96.98% (RSD 1.76%) for baicalin, 101.08% (RSD 3.1%) for berberine hydrochloride.</p><p><b>CONCLUSION</b>This method had been successfully applied to determine the content of geniposide, baicalin and berberine hydrochloride in Angong Niuhuang pill.</p>