ABSTRACT
OBJECTIVE： To establish a method for simultaneous determination of 6 components in Chaihuang tablets， such as baicalin， wogonoside， baicalein， wogonin， saikosaponin a and saikosaponin d in Chaihuang tablets. METHODS： HPLC-DAD method was used to detect 3 batches of Chaihuang tablets from same manufacturers. The determination was performed on Agilent Eclipse XDB-C18 column with mobile phase consisted of acetonitrile-triethylamine phosphate aqueous solution （pH adjusted to 7.0， gradient elution） at flow rate of 1.0 mL/min. The detection wavelengths were set at 210 nm （saikosaponin a， saikosaponin d） and 277 nm （baicalin， wogonoside， baicalein， wogonin）. The column temperature was 30 ℃， and sample size was 5 μL. RESULTS： The linear ranges of baicalin， wogonoside， baicalein， wogonin， saikosaponin a and saikosaponin d were 0.379 5-7.590 4 μg， 0.082 96-1.659 2 μg， 0.039 39-0.787 8 μg， 0.040 72-0.814 4 μg， 0.040 45-0.809 0 μg， 0.038 63-0.772 6 μg （all r≥0.999 3）， respectively. The limits of detection were 0.008， 0.007， 0.005， 0.005， 0.020 and 0.018 μg/mL. The limits of quantitation were 0.025， 0.022， 0.015， 0.015， 0.060， 0.054 μg/mL. RSDs of precision， reproducibility and stability tests （48 h） were all lower than 1.5％ （n＝6）. Average recoveries were 98.46％， 97.06％， 100.90％， 96.13％， 96.91％， 96.57％ （RSD＜2.0％， n＝6）. CONCLUSIONS： Established method is simple， accurate and reproducible for 6 components in Chaihuang tablets， and can be used for quality control of the tablet.
ABSTRACT
Objective:To establish the HPLC fingerprint of ethanol parts of compound Sanhuang tincture ( an anti-infective drug) using high performance liquid chromatography, and analyze the classification of the chemical components. Methods: A Phenomenex Luna C18 (2) (250 mm × 4. 6 mm, 5 μm) column was used. The mobile phase was acetonitrile-0. 05 mol·L-1 aqueous potassium di-hydrogen phosphate solution (22 :78) and the flow rate was 1. 0 ml·min-1 . The DAD detector was used and the detection wavelength was 237 nm. The column temperature was 30 ℃ and the injection volume was 10 μl. Results:The fingerprints of compound Sanhuang tincture were obtained with promising separation degree and the number of theoretical plates. A total of six fingerprint characteristic peaks were identified, and the reproducibility, stability and precision of the method were good. Meanwhile, combined with the informa-tion of retention time of compound medicine, single drug and reference substance, the source of characteristic peak of the effective part of compound Sanhuang tincture was determined. Conclusion:The fingerprints of compound Sanhuang tincture have strong characteris-tics and good reproducibility, which have important reference value for the quality evaluation of ethanol parts of compound Sanhuang tincture.