ABSTRACT
Objective To develop an HPLC method for simultaneous determination of contents of asiaticoside, tetrahydropulmatine and saikosaponin d in Shenji Huwei Granules. Methods The analysis was performed on a R&C C18 column (250 mm × 4.6 mm, 5 μm) by using the mobile phase of acetonitrile (A) - phosphate buffer (which used potassium dihydrogen phosphate 8.34 g, potassium phosphate 0.87 g dissolved by 1000 mL water) with gradient elution (0–15 min, 20％A; 15–30 min, 20％→40％A; 30–42 min, 40％A; 42–45 min, 40％→48％A; 45–50 min, 48％A; 50–70 min, 48％→50％A). The flow rate was 1.0 mL/min; the detection wavelength was set at 210 nm; the column temperature was maintained at 30 ℃. Results Asiaticoside, tetrahydropulmatine and saikosaponin d were in the linear ranges among 0.173–2.770 μg (r=0.9999), 0.021–1.320 μg (r=0.9992), 0.151–9.660 μg (r=0.9993), respectively. The average recovery rates of asiaticoside, tetrahydropulmatine, saikosaponin d were 96.25％, 97.02％, and 97.84％, respectively, and RSD were 2.31％, 4.51％, 1.87％, respectively. Conclusion This method is simple, with good separation effect and strong specificity, and can be used for simultaneous determination of contents of asiaticoside, tetrahydropulmatine and saikosaponin d in Shenji Huwei Granules, which provides references for perfection of quality control of Shenji Huwei Granules.
ABSTRACT
According to the specialty characteristics of medical college and university and the reality of teaching on the analytic chemistry experiment,this article explored a new thought on teaching of analytic chemistry experiment for majors of medicine and pharmaceutics.By optimizing the course teaching system,enhancing the requirement of experience teaching,renewing the teaching contents and integrating basal experiment with integrated and designed experiment,we obtained good teaching effect.