基于HPLC-Q-TOF-MS分析陈皮中多甲氧基黄酮部位的化学成分

Analysis of Polymethoxyflavonoids in Citri Reticulatae Pericarpium by HPLC-Q-TOF-MS

目的采用D101大孔吸附树脂对陈皮中的多甲氧基黄酮部位进行富集,进一步采用高效液相色谱-四极杆-飞行时间质谱法(HPLC-Q-TOF-MS)对其中的化学成分进行分析。方法陈皮提取物经D101大孔树脂吸附后,以不同浓度乙醇溶液洗脱,富集得到多甲氧基黄酮部位;采用高效液相色谱法分析测定其中的主要黄酮类成分含量;进一步采用HPLC-Q-TOF-MS结合多甲氧基黄酮类化合物的碎裂规律对其进行定性分析。结果建立的同时测定陈皮中7种黄酮类化合物的HPLC分析方法准确、可靠。富集后的多甲氧基黄酮类部位中,川陈皮素等化合物含量显著提高。采用高分辨质谱技术,分别从陈皮提取物和多甲氧基黄酮部位中鉴定出70和60个化合物,其中多甲氧基黄酮类化合物均为53种。结论研究结果为进一步辨识陈皮中多甲氧基黄酮部位的药效物质基础及质量控制方法的建立提供了实验依据。

OBJECTIVE To enrich the polymethoxyflavonoid-rich fraction from Citri Reticulatae Pericarpium using D101 macroporous resin,and further to analyse the chemical constituents using High-Performance Liquid Chromatography Quadrupole-Time-of-Flight Mass Spectrometry(HPLC-Q-TOF-MS).METHODS Citri Reticulatae Pericarpium extract was adsorbed on D101 macroporous resin and then eluted with different concentrations of ethanol to enrich the polymethoxyflavonoid-rich fraction;the content of the major flavonoid components was determined by high-performance liquid chromatography(HPLC);and the components were further analysed by HPLC-Q-TOF-MS.RESULTS The established HPLC method for the simultaneous determination of seven flavonoids in Citri Reticulatae Pericarpium extract was accurate and reliable.The contents of compounds such as nobiletin and tangeritin were significantly increased in the polymethoxyflavonoid-rich fraction.Using high resolution mass spectrometry(HRMS),70 and 60 compounds were identified from the Citri Reticulatae Pericarpium extract and the polymethoxyflavonoid-rich fraction,respectively,with 53 polymethoxyflavonoids being detected in these two extracts.CONCLUSION The results of this study provide an experimental basis for further identification of the pharmacological substance basis of the polymethoxyflavonoids in Citri Reticulatae Pericarpium and the establishment of quality control methods.