Simultaneous determination of six active components in traditional herbal medicine 'Oyaksungisan' by HPLC-DAD.
ABSTRACT In this study, an effective high performance liquid chromatography-diode array detector (HPLC-DAD) method was established for simultaneous determination of six marker compounds, ephedrine hydrochloride, 6-gingerol, glycyrrhizin, hesperidin, imperatorin and ferulic acid, in a Korean traditional prescription, Oyaksungisan, which is used for hemiplegia, arthralgia and paralysis. The six marker compounds of Oyaksungisan were separated on a LUNA C18 column (S-5 μm, 4.6 mm I.D. × 250 mm) at a column temperature of 35°C. The gradient elution was composed of water with 0.1% trifluoroacetic acid and methanol. The detection UV wavelengths were set at 207, 250, 280 and 320 nm. Calibration curves for the six compounds showed good linear regressions (R (2) > 0.9999). The limits of detection and limits of quantification were within the ranges 0.003-0.01 and 0.01-0.04 μg/ml, respectively. The relative standard deviation (RSD) values of intra- and inter-day testing were within the ranges 0.10-1.82 and 0.04-1.59%, respectively. The results of the recovery test were 95.05-104.27% with a RSD value of 0.11-1.85%. In conclusion, the simultaneous determination method developed was useful in the quality evaluation of Oyaksungisan.
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ABSTRACT: A simple and convenient method was established for simultaneous quantitative determination of piperine and piperlonguminine in dried fruits of Piper longum and allied plants. The average content of piperine in P. longum (18.26 mg/g, range 12.05-33.23 mg/g) was about one half that of P. nigrum (40.09 mg/g, range 29.57-54.23 mg/g), but the content of piperlonguminine in P. longum was in the range of 0.42-1.82 mg/g, and the average content of piperlonguminne (0.91 mg/g) was about seven times higher than that in P. nigrum (0.13 mg/g). A sample of P. longum from Vietnam and a sample of P. retrofractum collected in Ishigaki, Japan, showed high contents of piperine and piperlonguminine. On the other hand, a sample of P. betle collected in Taiwan showed low content of piperine, and piperlonguminine was not detected.Journal of Natural Medicines 04/2013; · 1.52 Impact Factor