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Yin R, Chen L, Ma L. Extraction of matrine from soil with matrix solid‐phase dispersion by molecularly imprinted polymers derived from lignin‐based Pickering emulsions. J Sep Sci 2019; 42:3563-3570. [DOI: 10.1002/jssc.201900803] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 09/30/2019] [Accepted: 10/01/2019] [Indexed: 01/10/2023]
Affiliation(s)
- Ran Yin
- College of ChemistryChemical Engineering and Resource UtilizationNortheast Forestry University Harbin P. R. China
| | - Ligang Chen
- College of ChemistryChemical Engineering and Resource UtilizationNortheast Forestry University Harbin P. R. China
| | - Ling Ma
- College of ForestryNortheast Forestry University Harbin P. R. China
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Liu Y, Zhou W, Mao Z, Chen Z. Analysis of Evodiae Fructus by capillary electrochromatography-mass spectrometry with methyl-vinylimidazole functionalized organic polymer monolilth as stationary phases. J Chromatogr A 2019; 1602:474-480. [PMID: 31202495 DOI: 10.1016/j.chroma.2019.06.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 05/24/2019] [Accepted: 06/04/2019] [Indexed: 12/20/2022]
Abstract
Evodiae Fructus is used as a traditional Chinese medicine for the treatment of several kinds of diseases with its bioactive constituents. In this study, a capillary electrochromatography-mass spectrometry (CEC-MS) method was developed to determine three bioactive compounds including evodiamine, rutaecarpine and limonin in Evodiae Fructus fruit. Home-developed monolithic columns with methyl-vinylimidazole functionalized organic polymer monolilth as stationary phases were used in CEC-MS with excellent separation selectivity and high efficiency. The CEC-MS methods provided 4-16 folds improvement of LODs when compared with CEC-UV method. The conditions, which could affect separation efficiency and detection sensitivity, were optimized. Under optimum conditions, baseline separation with high detection sensitivity was obtained. The method showed good linearity (R2 >0.99) of 0.8-160 μg mL-1 with low limits of detection of 0.15-0.31 μg mL-1. Relative standard deviations of migration time and relative peak areas were <13.89%. Recoveries of evodiamine, rutaecarpine and limonin in Evodiae Fructus fruit were tested and calculated, which ranged from 102% to 113%. Finally, the three bioactive compounds in Evodiae Fructus herb samples from different regions were analyzed and studied. It has been demonstrated that the developed method has great potential for quality control of Evodiae Fructus herb.
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Affiliation(s)
- Yikun Liu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China
| | - Wei Zhou
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China
| | - Zhenkun Mao
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China
| | - Zilin Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China.
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Zhou W, Liu Y, Liao X, Chen Z. Capillary electrophoresis-mass spectrometry using robust poly(ether ether ketone) capillary for tolerance to high content of organic solvents. J Chromatogr A 2019; 1593:156-163. [DOI: 10.1016/j.chroma.2019.01.070] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/23/2019] [Accepted: 01/25/2019] [Indexed: 11/30/2022]
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Liu Y, Zhou W, Mao Z, Liao X, Chen Z. Analysis of six active components in Radix tinosporae by nonaqueous capillary electrophoresis with mass spectrometry. J Sep Sci 2017; 40:4628-4635. [PMID: 28975733 DOI: 10.1002/jssc.201700815] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 08/28/2017] [Accepted: 09/22/2017] [Indexed: 11/06/2022]
Abstract
Nonaqueous capillary electrophoresis with mass spectrometry has advantages for the analysis of active components in herbs. Here, a rapid nonaqueous capillary electrophoresis with mass spectrometry method was developed to separate, identify, and quantify palmatin, columbin, cepharanthine, menisperine, magnoflorine, and 20-hydroxyecdysone in Radix tinosporae. Electrospray ionization MS1-3 spectra of the six components were collected and possible cleavage pathways of main fragment ions were elucidated. The conditions that could affect separation, such as the composition of running buffer and applied voltage, were studied, and the conditions that could affect the mass spectrometry detection, such as the composition and flow rate of sheath liquid, the pressure of nitrogen gas, and the temperature and flow rate of the dry gas, were also optimized. Under the optimized conditions, the correlation coefficient was >0.99. The relative standard deviations of migration time and peak areas were <10%. The recoveries were calculated to be 99.31-107.80% in real samples. It has been demonstrated that the proposed method has good potential to be applied to determine the six bioactive components in Radix tinosporae.
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Affiliation(s)
- Yikun Liu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan, China.,State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing, China
| | - Wei Zhou
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan, China.,State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing, China
| | - Zhenkun Mao
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan, China
| | - Xiaoyan Liao
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan, China
| | - Zilin Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan, China.,State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing, China
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Jiang Y, He MY, Zhang WJ, Luo P, Guo D, Fang X, Xu W. Recent advances of capillary electrophoresis-mass spectrometry instrumentation and methodology. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2017.05.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Abstract
The term nonaqueous capillary electrophoresis (NACE) commonly refers to capillary electrophoresis with purely nonaqueous background electrolytes (BGE). Main advantages of NACE are the possibility to analyze substances with very low solubility in aqueous media as well as separation selectivity that can be quite different in organic solvents (compared to water)-a property that can be employed for manipulation of separation selectivities. Mass spectrometry (MS) has become more and more popular as a detector in CE a fact that applies also for NACE. In the present chapter, the development of NACE-MS since 2004 is reviewed. Relevant parameters like composition of BGE and its influence on separation and detection in NACE as well as sheath liquid for NACE-MS are discussed. Finally, an overview of the papers published in the field of NACE-MS between 2004 and 2014 is given. Applications are grouped according to the field (analysis of natural products, biomedical analysis, food analysis, analysis of industrial products, and fundamental investigations).
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Affiliation(s)
- Christian W Klampfl
- Institute of Analytical Chemistry, Johannes Kepler University Linz, Altenberger Straße 69, Linz, 4040, Austria.
| | - Markus Himmelsbach
- Institute of Analytical Chemistry, Johannes Kepler University Linz, Altenberger Straße 69, Linz, 4040, Austria
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Wei X, Wang X, Gong Q, Wang L, Zhou S. Enhanced fluorescence quenching in an acridine orange - alizarin red system through matrine and its analytical application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 134:413-418. [PMID: 25025314 DOI: 10.1016/j.saa.2014.06.115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 06/16/2014] [Accepted: 06/18/2014] [Indexed: 06/03/2023]
Abstract
This study shows that alizarin red (AR) only slightly quenched fluorescence for acridine orange (AO) in an AR/AO mixed solution at pH=5-6. The reduced fluorescent signal was closely and linearly associated with the level of MT added to the system, which is the basis for a new quantitative MT assay method using the fluorescence quenching reaction in the AO-AR system. The results show that under optimal conditions, this method had a 14.9-43.5 mg L(-1) linear detection range with a 1.38 mg L(-1) detection limit and 1.24% precision. In addition, this method was used to determine the MT levels in the commercially available MT-containing pesticides and suppositories, which showed a 96.6-103% recovery. Therefore, this method has multiple advantages, including simple and fast operation, high accuracy and low cost. Moreover, herein, we investigated the underlying mechanism in-depth using an ultraviolet (UV) spectroscopic technique.
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Affiliation(s)
- Xiaoling Wei
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Xiaojun Wang
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Qi Gong
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Lisheng Wang
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
| | - Shiwu Zhou
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
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Klepárník K. Recent advances in combination of capillary electrophoresis with mass spectrometry: Methodology and theory. Electrophoresis 2014; 36:159-78. [DOI: 10.1002/elps.201400392] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 09/11/2014] [Accepted: 09/11/2014] [Indexed: 12/15/2022]
Affiliation(s)
- Karel Klepárník
- Institute of Analytical Chemistry; Academy of Sciences of the Czech Republic; Brno Czech Republic
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Enhancement of capillary electrochromatographic separation performance by conductive polymer in a layer-by-layer fabricated graphene stationary phase. J Chromatogr A 2014; 1339:192-9. [DOI: 10.1016/j.chroma.2014.02.083] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 02/26/2014] [Accepted: 02/27/2014] [Indexed: 12/20/2022]
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Kenndler E. A critical overview of non-aqueous capillary electrophoresis. Part I: Mobility and separation selectivity. J Chromatogr A 2014; 1335:16-30. [DOI: 10.1016/j.chroma.2014.01.010] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 01/07/2014] [Accepted: 01/07/2014] [Indexed: 11/29/2022]
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A critical overview of non-aqueous capillary electrophoresis. Part II: separation efficiency and analysis time. J Chromatogr A 2014; 1335:31-41. [PMID: 24485541 DOI: 10.1016/j.chroma.2014.01.030] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2013] [Revised: 01/09/2014] [Accepted: 01/11/2014] [Indexed: 12/22/2022]
Abstract
A survey of the literature on non-aqueous capillary zone electrophoresis leaves one with the impression of a prevailing notion that non-aqueous conditions are principally more favorable than conventional aqueous media. Specifically, the application of organic solvents in capillary zone electrophoresis (CZE) is believed to provide the general advantages of superior separation efficiency, higher applicable electric field strength, and shorter analysis time. These advantages, however, are often claimed without providing any experimental evidence, or based on rather uncritical comparisons of limited sets of arbitrarily selected separation results. Therefore, the performance characteristics of non-aqueous vs. aqueous CZE certainly deserve closer scrutiny. The primary intention of Part II of this review is to give a critical survey of the literature on non-aqueous capillary electrophoresis (NACE) that has emerged over the last five years. Emphasis is mainly placed on those studies that are concerned with the aspects of plate height, plate number, and the crucial mechanisms contributing to zone broadening, both in organic and aqueous conditions. To facilitate a deeper understanding, this treatment covers also the theoretical fundamentals of peak dispersion phenomena arising from wall adsorption; concentration overload (electromigration dispersion); longitudinal diffusion; and thermal gradients. Theoretically achievable plate numbers are discussed, both under limiting (at zero ionic strength) and application-relevant conditions (at finite ionic strength). In addition, the impact of the superimposed electroosmotic flow contributions to overall CZE performance is addressed, both for aqueous and non-aqueous media. It was concluded that for peak dispersion due to wall adsorption and due to concentration overload (electromigration dispersion, leading to peak triangulation) no general conjunction with the solvent can be deduced. This is in contrast to longitudinal diffusion: the plate height (and the plate number) obtainable under limiting conditions (at zero ionic strength) has the same ultimate value for all solvents. However, in background electrolytes with finite ionic strength, the maximum reachable plate number depends on the solvent, and in water it is higher than in the most commonly used organic solvents: methanol and acetonitrile. Thermal peak broadening is also larger in the organic solvents if compared to aqueous solutions under comparable conditions. However, its influence on the plate height is negligible under conditions established with commercial instrumentation. From the laws of electric and thermal conductance, it follows that no general conclusion can be drawn that with organic solvents higher field strength can be applied and shorter analysis time can be reached; the contrary is more evident: under comparable conditions aqueous solutions lead to more favorable results. This comprehensive analysis provides strong evidence that the broadly held notion of non-aqueous CZE being principally superior to aqueous CZE is a myth rather than a fact. However, several studies in which the employment of non-aqueous conditions has been instrumental to solve challenging analytical problems demonstrate that the intelligent use of non-aqueous CE has and will continue having its place in modern separation science.
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