Structural Stabilities and Transformation Mechanism of Rhynchophylline and Isorhynchophylline by Ultra Performance Liquid Chromatography/Time-of-Flight Mass Spectrometry (UPLC/Q-TOF-MS).
To reveal the structural stabilities and transformation mechanism of rhynchophylline (RIN) and isorhynchophylline (IRN), HPLC and UPLC-Q-TOF-MS method were developed for the qualitative and quantitative analysis of the conversion rate. The method was validated for linearity, inter- and intra-day precisions, repeatability and stability. All the quantitative determination method validation results were satisfactory. Under the optimized chromatographic conditions, the effect of various heat temperatures, retention time, and solvent polarities on conversion rate and equilibrium were systematically investigated for the first time. Besides, a model relating the retention yield value and time-temperature was built to predict the t0.5 and Ea of the conversion rate by the Arrhenius equation. The experimental results proved to be in good accordance with the predicted values. Furthermore, UPLC-Q-TOF-MS analysis was performed to verify the transformation mechanism and provide valuable information for stability analysis of the conversion products.
Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China. zfwu527@163.com.
Zhen-Feng
ZF
Wu
Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China. wangyaqi_3@163.com.
Ya-Qi
YQ
Wang
Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China. wanna988@163.com.
Na
N
Wan
Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China. kg_rgl@126.com.|Luzhou People's Hospital, Luzhou 646100, China. kg_rgl@126.com.
Gang
G
Ke
Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China. ypfpharm@126.com.
Peng-Fei
PF
Yue
Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China. 13707096286@163.com.
Hao
H
Chen
Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China. 15570370525@163.com.
Juan-Juan
JJ
Zhan
Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China. tcmmingyang@163.com.
Ming
M
Yang
D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D026121:Indole Alkaloids / Q000737:chemistry*; D007700:Kinetics; D013058:Mass Spectrometry / Q000379:methods*; D000078183:Oxindoles; D012997:Solvents; D013696:Temperature; D013997:Time Factors
D026121:Indole Alkaloids; D000078183:Oxindoles; D012997:Solvents; C052714:rhyncophylline
UPLC-Q-TOF-MS; conversion rate; isorhynchophylline; rhynchophylline; stability