ABSTRACT
A simple,rapid and sensitive liquid chromatography-mass spectrometry（LC-MS）method was developed for the determination of salidroside in rat plasma and study of its pharmacokinetics after oral administration of suspension of Erzhi Wan and Fructus Ligustri lucidi into Wistar rats.Plasma sample of 200 μL was extracted with acetic ether-isopropanol（2∶1）and the extraction was performed on a Kromasil C18 column（150 mm×4.6 mm,5 μm）with the mobile phase of methanol-water（41∶59,v/v）within a run time of 6.0 min.The analyte was monitored with positive electrospray ionization（ESI）by selected ion monitoring（SIM）mode.The target ions were m/z 323.05 for salidroside and m/z 411.05 for internal standard（IS）geniposide.A good linear relationship was obtained over the range of 5.0-500.0 ng/mL and the lower limit of quantification was 5.0 ng/mL.The validated method was successfully applied to the pharmacokinetic study of salidroside in rat plasma after oral administration of suspension of Erzhi Wan and Fructus Ligustri lucidi.
ABSTRACT
A simple,rapid and sensitive liquid chromatography-mass spectrometry (LC-MS) method was developed for the determination of salidroside in rat plasma and study of its pharmacokinetics after oral administration of suspension of Erzhi Wan and Fructus Ligustri lucidi into Wistar rats.Plasma sample of 200 μL was extracted with acetic etherisopropanol (2:1) and the extraction was performed on a Kromasil C18 column (150 mm×4.6mm,5 μm) with the mobile phase of methanol-water (41:59,v/v) within a run time of 6.0min.The analyte was monitored with positive electrospray ionization (ESI) by selected ion monitoring (SIM) mode.The target ions were m/z 323.05 for salidroside and m/z 411.05 for internal standard (IS) geniposide.A good linear relationship was obtained over the range of 5.0-500.0 ng/mL and the lower limit of quantification was 5.0 ng/mL.The validated method was successfully applied to the pharmacokinetic study of salidroside in rat plasma after oral administration of suspension of Erzhi Wan and Fructus Ligustri lucidi.
ABSTRACT
Objective To develop an HPLC method for the quantitative analysis of tricin in malt. Methods HPLC method was used. Analysis was performed on Spherigel C_ 18 column (150 mm?4.6 mm, 5 ?m) with acetonitrile-water-tetrahydrofuran-methanoic acid (26∶74∶10∶1) as mobile phase. The detection wavelength was 350 nm, flow rate was 1.0 mL/min, and the analysic volumn was set at 20 ?L. Results The calibration curve of tricin was linear in the range of 0.22-2.15 mg/L (r=0.999 8). The average recovery rate of tricin was 97.4% (RSD=1.7%) (n=9). Conclusion The method can be used to determine tricin in raw malt quantitatively.