Simultaneous determination of seven C21 steroidal saponins in Cortex periplocae extract by quantitative analysis of multi-components by single-marker
LI Ruixue1 WU Fei1,2,3 ZHANG Jiquan1,2 FENG Yi1,2
1.Engineering Research Center of Modern Preparation Technology of Traditional Chinese Medicine, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China;
2.Engineering Research Center of Modern Preparation Technology of Traditional Chinese Medicine of Zhangjiang Shanghai, Shanghai 201203, China; 3.College of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
Abstract:Objective To establish a high performance liquid chromatography method for quantitative analysis of seven C21 steroidal saponins in Cortex periplocae extract by quantitative analysis of multi-components by single-marker. Methods The high performance liquid chromatography analysis was performed on a Capcell Pak C18 column with the detection wavelength at 263 nm. The mobile phase was water containing 0.2% formic acid and acetonitrile in the gradient mode. Periploside C (PSA) was used as the internal marker to establish relative correction factors between PSA and periploside K (PSK), periploside R (WJ53), periploside E (WJ521), periploside D (PSD), periploside Q (WJ33), periploside O (WJ32), and the relative correction factors would be used in the calculation of their contents. The result of quantitative analysis of multi-components by single-marker was compared with external standard method, so as to verify the accuracy of quantitative analysis of multi-components by single-marker. Results The relative correction factors between PSA and PSK, WJ53, WJ521, PSD, WJ33, WJ32 was 0.867, 0.867, 0.847, 0.994, 0.922 and 1.029, respectively. The content values calculated by correction factors and measured values of external standard method did not show significant differences. Conclusion The established quantitative analysis of multi-components by single-marker method is feasible, accurate, simple and can be used as a method for the determination of multi-component indexes in the extract of Cortex periplocae.