Simultaneous Determination of Liquiritin, Isoliquiritin, Glycyrrhizin, Isoliquiritigenin and Glycyrrhizic Acid in Licorice Extract by HPLC Dual Wavelength Spectrophotometry
10.3969/j.issn.1005-5304.2017.12.016
- VernacularTitle:HPLC双波长法同时测定甘草药渣提取物中甘草苷、异甘草苷、甘草素、异甘草素及甘草酸含量
- Author:
yan Yan LUO
1
;
shuan Xiao LIU
;
guo Zheng XIAO
;
xiang Xi LI
;
wen Ji LI
;
yan Ying BI
;
tao Bo ZHANG
Author Information
1. 甘肃中医药大学药学院
- Keywords:
licorice extract;
HPLC;
dual wavelength spectrophotometry;
content determination
- From:
Chinese Journal of Information on Traditional Chinese Medicine
2017;24(12):64-67
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish a method for the simultaneous determination of liquiritin, isoliquiritin, glycyrrhizin, isoliquiritigenin and glycyrrhizic acid in licorice extract. Methods Liquiritin, isoliquiritin, glycyrrhizin, isoliquiritigenin and glycyrrhizic acid in licorice extract were determined by HPLC dual wavelength spectrophotometry. Symmetry C18 column (4.6 mm × 250 mm, 5 μm) was used. The mobile phase was acetonitrile (A) - 0.085％ phosphoric acid water (B), ingradient elution mode (0–8 min, 81％ B; 8–35 min, 81％→50％ B; 35–60 min, 50％ B) with the flow rate of 1.0 mL/min. The sample size was 10 μL, and column temperature was room temperature. Dual wavelength detection, λ1=237 nm, λ2=254 nm. Results Liquiritin, isoliquiritin, glycyrrhizin, isoliquiritigenin and glycyrrhizic acid were linear in the ranges of 0.0408–0.816 μg, 0.0528–1.056 μg, 0.0224–0.448 μg, 0.0212–0.424 μg, and 0.0448–0.896 μg, respectively. The average recovery was 98.69％, 98.31％, 99.10％, 98.55％, and 99.14％, respectively; RSD was 1.39％, 1.29％, 1.78％, 2.14％, and 1.15 ％, respectively. Conclusion The method is accurate, reliable and specific. The results are stable with good repeatability. It can be used for the determine of above 5 components in licorice extract.
