Simultaneous determination of six constituents in Qishiwei Zhenzhu Pills by HPLC / 中成药

ABSTRACT

AIM To establish an HPLC method for the simultaneous content determination of six constituents in Tibetan medicine Qishiwei Zhenzhu Pills (Croci Stigma,Dalbergiae odoriferae Lignum,Glycyrrhizae Radix et Rhizoma,etc.).METHODS The analysis of 50％ methanol extract of this drug was carried out on a 30 ℃ thermostatic Inertsil(C)ODS-3 column (250 mm ×4.6 mm,5 μm),with the mobile phase comprising of 0.2％ phosphoric acid-acetonitrile flowing at 0.8 mL/min in a gradient elution manner,and the detection wavelength was set at 254 nm.RESULTS Gallic acid,corilagin,agarotetrol,ellagic acid,crocin Ⅰ and crocin Ⅱ showed good linear relationships within the ranges of 1.41-42.24,0.61-18.24,0.30-9.12,0.47-14.04,0.62-18.48 and 0.32-9.45 μg/mL (R2 ≥0.999 4),whose average recoveries (RSDs) were 93.41％ (1.75％),96.84％ (1.75％),97.45％ (0.58％),93.22％ (0.56％),97.01％ (1.39％) and 97.22％ (1.11％),respectively.The contents of various constituents in different batches of samples from two manufactures showed some differences,especially for those of corilagin and agarotetrol.CONCLUSION We should pay attention to the unstable quality of Qishiwei Zhenzhu Pills.