title: Novel two-dimensional reversed-phase liquid chromatography/hydrophilic interaction chromatography, an excellent orthogonal system for practical analysis.
abstract: A novel two-dimensional reversed-phase liquid chromatography/hydrophilic interaction chromatography (2D-RPLC/HILIC) system is developed with the introduction of the click beta-cyclodextrin (beta-CD) stationary phase. The offline system shows excellent abilities for the separation of polar and medium-polarity components in traditional Chinese medicine (TCM). It facilitates us not only to separate components that cannot be resolved by uni-dimensional chromatography, but also to achieve much more efficient detection of components with low abundance. The orthogonality of this new system is excellent. A simple geometric approach is developed to characterize the practical orthogonality of 2D-LC in the analysis of complex unknown samples. The mathematical characterization results are in good accordance with the experimental findings, and both demonstrate that the proposed 2D-RPLC/HILIC system is a powerful tool for the separation of polar and medium-polarity complex samples. This system may have a great potential for the separation of peptides and metabolomic compounds with similar polarity.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China.
authors.forename: Yanming
authors.initials: Y
authors.lastname: Liu
authors.forename: Xingya
authors.initials: X
authors.lastname: Xue
authors.forename: Zhimou
authors.initials: Z
authors.lastname: Guo
authors.forename: Qing
authors.initials: Q
authors.lastname: Xu
authors.forename: Feifang
authors.initials: F
authors.lastname: Zhang
authors.forename: Xinmiao
authors.initials: X
authors.lastname: Liang
mesh_terms: D031187:Carthamus tinctorius / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000032:analysis* / Q000737:chemistry; D047392:beta-Cyclodextrins / Q000737:chemistry
chemical_list: D004365:Drugs, Chinese Herbal; D047392:beta-Cyclodextrins