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Asokan K, Shaikh KM, Tele SS, Chauthe SK, Ansar S, Vetrichelvan M, Nimje R, Gupta A, Gupta AK, Sarabu R, Wu DR, Mathur A, Bajpai L. Applications of 2, 2, 2 trifluoroethanol as a versatile co-solvent in supercritical fluid chromatography for purification of unstable boronate esters, enhancing throughput, reducing epimerization, and for additive free purifications. J Chromatogr A 2018; 1531:122-130. [DOI: 10.1016/j.chroma.2017.11.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 11/13/2017] [Accepted: 11/14/2017] [Indexed: 01/19/2023]
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Hou J, Li G, Wei Y, Lu H, Jiang C, Zhou X, Meng F, Cao J, Liu J. Analysis of five alkaloids using surfactant-coated multi-walled carbon nanotubes as the pseudostationary phase in nonaqueous capillary electrophoresis. J Chromatogr A 2014; 1343:174-81. [PMID: 24720903 DOI: 10.1016/j.chroma.2014.03.051] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 03/18/2014] [Accepted: 03/21/2014] [Indexed: 02/07/2023]
Abstract
In this paper, surfactant-coated multi-walled carbon nanotubes (SC-MWNTs) have been proposed as a novel pseudostationary phase (PSP) to enhance the separation of isoquinoline alkaloids in nonaqueous capillary electrophoresis (NACE). Several parameters affecting NACE separation were studied including the MWNT concentration, the electrolyte concentration, pH* and the separation voltage. In comparison to conventional NACE, the addition of an MWNT dispersion using surfactant solutions in the electrolyte produced an important enhancement in the resolution due to the π-π interactions between the analytes and the surface of the carbon nanotubes. Using SC-MWNTs (6μgmL(-1)) as a PSP in the background electrolyte (BGE) (i.e., 20mM sodium acetate in methanol-acetonitrile (80:20, v/v)) provided the complete separation of five alkaloids. Finally, the developed method has been successfully applied to the detection and quantification of the tested compounds of Rhizoma Coptidis.
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Affiliation(s)
- Jingyi Hou
- Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Haidian District, Beijing 100088, PR China; State Key Laboratory Breeding Base of Dao-di Herbs, China Academy of Chinese Medical Sciences, Beijing 100700, PR China
| | - Geng Li
- Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Haidian District, Beijing 100088, PR China; State Key Laboratory Breeding Base of Dao-di Herbs, China Academy of Chinese Medical Sciences, Beijing 100700, PR China
| | - Yingqin Wei
- Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Haidian District, Beijing 100088, PR China; State Key Laboratory Breeding Base of Dao-di Herbs, China Academy of Chinese Medical Sciences, Beijing 100700, PR China; School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, PR China
| | - Heng Lu
- Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Haidian District, Beijing 100088, PR China; State Key Laboratory Breeding Base of Dao-di Herbs, China Academy of Chinese Medical Sciences, Beijing 100700, PR China
| | - Chao Jiang
- Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Haidian District, Beijing 100088, PR China; State Key Laboratory Breeding Base of Dao-di Herbs, China Academy of Chinese Medical Sciences, Beijing 100700, PR China
| | - Xiaoteng Zhou
- Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Haidian District, Beijing 100088, PR China; State Key Laboratory Breeding Base of Dao-di Herbs, China Academy of Chinese Medical Sciences, Beijing 100700, PR China
| | - Fanyun Meng
- Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Haidian District, Beijing 100088, PR China; State Key Laboratory Breeding Base of Dao-di Herbs, China Academy of Chinese Medical Sciences, Beijing 100700, PR China.
| | - Jun Cao
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, PR China.
| | - Jinxin Liu
- Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Haidian District, Beijing 100088, PR China; State Key Laboratory Breeding Base of Dao-di Herbs, China Academy of Chinese Medical Sciences, Beijing 100700, PR China.
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