OBJECTIVE:To establish a method for sim ultaneous determination of 7-hydroxycoumarin,6,7-dimethoxy- coumarin,5,7-dimethoxycoumarin,imperatorin and bergaptene in Shugan hewei pills. METHODS :Samples were extracted by Soxhlet extraction and separated by using D 101 macroporous adsorption resin ;HPLC method was used to determine the contents of above 5 components. The determination was performed on Venusil MP C 18 column with mobile phase consisted of methanol- 0.1% phosphoric acid water solution (gradient elution )at the flow rate of 1.0 mL/min. The detection wavelength was 270 nm and the column temperature was 30 ℃ . The sample size was 10 μ L. RESULTS:The linear ranges were 1.875-187.5 μ g/mL for 7-hydroxycoumarin(r=0.999 9),1.075-107.5 μg/mL for 6,7-dimethoxycoumarin(r=0.999 9),1.261-126.1 μg/mL for 5, 7-dimethoxycoumarin(r=0.999 9),0.875-87.5 μg/mL for imperatorin(r=0.999 9),2.033-203.3 μg/mL for bergaptene(r=0.999 8), respectively. RSDs of precision ,stability(24 h),reproducibility and durability tests were lower than 2.0%. Average recoveries were 95.18% -98.44% (RSD=1.27% ,n=6), 95.35% -98.14% (RSD=1.16% ,n=6),95.21% -97.32% (RSD=0.83% ,n=6), 95.43%-97.14%(RSD=0.76%,n=6),95.12%-98.75%(RSD=1.35%,n=6),respectively. The average contents of the above five components in 3 batches of shugan hewei pills were 0.424,0.239,0.305,0.180,0.459 mg/g(n=2).CONCLUSIONS:A method for simultaneous determination of five components in Shugan hewei pills was established.
College of Pharmacy, Shandong University of Traditional Chinese Medicine
Binzhou Key Laboratory of Chemical Drug Research and Quality Control
Binzhou Testing Center
College of Pharmacy, Hubei University of Chinese Medicine
Dept. of Pharmacy, Hubei Provincial Hospital of Traditional Chinese Medicine/the Affiliated Hospital of Hubei University of Chinese Medicine/Hubei Province Academy of Traditional Chinese Medicine