Online high-pH reversed-phase liquid chromatography x low-pH reversed-phase liquid chromatography tandem electrospray ionization mass spectrometry combined with pulse elution gradient in the first dimension for the analysis of alkaloids in Macleaya cordata (willd.) R. Br

被引：5

作者：

Hu, Deping ^{[1
]}

Li, Yuandong ^{[2
]}

Zhao, Hui ^{[2
]}

Zhao, Yang ^{[2
]}

Huang, Si ^{[1
]}

Li, Juan ^{[2
]}

Li, Zhenjie ^{[2
]}

Duan, Yuanxing ^{[2
]}

Chen, Yingzhuang ^{[1
]}

Xia, Jianjun ^{[2
]}

机构：

[1] Hunan Normal Univ, Key Lab Chem Biol & Tradit Chinese Med Res, Key Lab Phytochem R&D Hunan Prov, Minist Educ, Lushan Rd 36, Changsha 410081, Peoples R China

[2] China Tobacco Yunnan Ind Co Ltd, Ctr Res & Dev, Yunnan Key Lab Tobacco Chem, Kunming 650231, Yunnan, Peoples R China

来源：

JOURNAL OF SEPARATION SCIENCE | 2020年 / 43卷 / 08期

关键词：

alkaloids; comprehensive two-dimensional liquid chromatography; pulsed elution; reversed-phase liquid chromatography x reversed-phase liquid chromatography; traditional Chinese medicine; CHELERYTHRINE;

D O I：

10.1002/jssc.201900950

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An online high-pH reversed-phase liquid chromatographyx low-pH reversed-phase liquid chromatography tandem electrospray ionization mass spectrometry combined with pulse elution gradient in the first dimension was constructed to separate and identify alkaloids from Macleaya cordata (willd.) R. Br. The modulation was performed by using a dual second dimensional columns interface combined with a make-up dilution pump, which is responsible for dilution and neutralization of the first dimensional effluent, and the dual second dimensional columns integrated the trapping and the separation function to reduce the second dimension system dead volume. Taking advantage of the dissociable characteristics of alkaloids, mobile phases with different pH values were applied in the first dimension (pH 9.0) and the second dimension (pH 2.6) to improve the orthogonality of two-dimension separation. Besides, the pulse elution gradient in first dimension and second dimensional gradient were carefully optimized and much better separation was achieved compared to the separation with the traditional two-dimensional liquid chromatography approach. Finally, mass measurement was performed for alkaloids in M. cordata (willd.) R. Br. by coupling proposed two-dimensional liquid chromatography system with triple quadrupole mass spectrometry, and 39 alkaloids were successfully identified by comparing the obtained result with the former reported results.

引用

页码：1423 / 1430

页数：8