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Przybylska A, Gackowski M, Koba M. Application of Capillary Electrophoresis to the Analysis of Bioactive Compounds in Herbal Raw Materials. Molecules 2021; 26:2135. [PMID: 33917716 PMCID: PMC8068163 DOI: 10.3390/molecules26082135] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/04/2021] [Accepted: 04/06/2021] [Indexed: 12/17/2022] Open
Abstract
The article is a summary of scientific reports from the last 16 years (2005-2021) on the use of capillary electrophoresis to analyze polyphenolic compounds, coumarins, amino acids, and alkaloids in teas or different parts of plants used to prepare aqueous infusions, commonly known as "tea" or decoctions. This literature review is based on PRISMA guidelines and articles selected in base of criteria carried out using PICOS (Population, Intervention, Comparison, Outcome, Study type). The analysis showed that over 60% of articles included in this manuscript comes from China. The literature review shows that for the selective electrophoretic separation of polyphenolic and flavonoid compounds, the most frequently used capillary electromigration technique is capillary electrophoresis with ultraviolet detection. Nevertheless, the use of capillary electrophoresis-mass spectrometry allows for the sensitive determination of analytes with a lower limit of detection and gives hope for routine use in the analysis of functional foods. Moreover, using the modifications in electrochemical techniques allows methods sensitivity reduction along with the reduction of analysis time.
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Affiliation(s)
- Anna Przybylska
- Department of Toxicology and Bromatology, Faculty of Pharmacy, L. Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, A. Jurasza 2 Street, PL-85089 Bydgoszcz, Poland; (M.G.); (M.K.)
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Cabooter D, Song H, Makey D, Sadriaj D, Dittmann M, Stoll D, Desmet G. Measurement and modelling of the intra-particle diffusion and b-term in reversed-phase liquid chromatography. J Chromatogr A 2020; 1637:461852. [PMID: 33412290 DOI: 10.1016/j.chroma.2020.461852] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 12/11/2022]
Abstract
In an ongoing effort to better understand the underlying mechanisms of band broadening in particle-packed reversed-phase liquid chromatography columns, new models for intra-particle diffusion, representing an adsorption- and partition-type retention behavior, are proposed. These models assume the mesoporous zone inside the particles is subdivided in four distinct regions: a fraction f1 filled with bulk mobile phase, a fraction f2 enriched in pure organic modifier extending outside the stationary phase layer, a fraction f3 comprising the liquid surrounding the alkyl chains and a fraction f4 consisting of the stationary phase alkyl chains. Intra-particle diffusion is calculated as a residence time weighted average of the diffusion in these different regions. Experimental procedures and models are proposed to determine the volumes of these four regions and applied to three reversed-phase liquid chromatography columns with different pore sizes (80 Å versus 300 Å) and different stationary phase types (C18 versus C8). The newly proposed models are then applied to predict the intra-particle diffusion of butyrophenone across a wide range of retention factors (1 ≤ k" ≤ 40) in each of these columns. These predictions are compared to experimental data that are extracted from the effective diffusion coefficients of butyrophenone obtained via peak parking experiments. It is demonstrated that both adsorption- and partition-type models for intra-particle diffusion model the actual behavior of the test compound well, and require the determination of only one (partition) or two (adsorption) fitting factors: the obstruction to free movement the analytes experience from the alkyl chains in the retained state (partition and adsorption) and in the unretained state (adsorption). Finally, it is demonstrated that the major contributor to the intra-particle diffusion of retained compounds (k" > 2) is the diffusion these analytes undergo when retained in the organic-modifier enriched zone surrounding the alkyl chains (partition model) or when adsorbed onto the alkyl chains (adsorption model), confirming that surface diffusion plays an important role in the mass transfer of retained compounds in reversed-phase liquid chromatography columns.
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Affiliation(s)
- Deirdre Cabooter
- University of Leuven (KU Leuven), Department for Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis, Herestraat 49, Leuven, Belgium.
| | - Huiying Song
- University of Leuven (KU Leuven), Department for Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis, Herestraat 49, Leuven, Belgium
| | - Devin Makey
- Gustavus Adolphus College, Department of Chemistry, 800 West College Avenue, Saint Peter, USA
| | - Donatela Sadriaj
- University of Leuven (KU Leuven), Department for Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis, Herestraat 49, Leuven, Belgium
| | - Monika Dittmann
- Agilent Technologies R&D, Hewlett-Packard-Strasse 8, Waldbronn, Germany
| | - Dwight Stoll
- Gustavus Adolphus College, Department of Chemistry, 800 West College Avenue, Saint Peter, USA
| | - Gert Desmet
- Vrije Universiteit Brussel, Department of Chemical Engineering, Pleinlaan 2, 1050 Brussel, Belgium
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Acquaviva A, Jones A, Dennis GR, Shalliker RA, Soliven A. Phenolic profiling of complex tea samples via simultaneous multiplexed detection employing reaction flow HPLC columns and colorimetric post column derivatisation. Microchem J 2018. [DOI: 10.1016/j.microc.2018.01.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Arries WJ, Tredoux AGJ, de Beer D, Joubert E, de Villiers A. Evaluation of capillary electrophoresis for the analysis of rooibos and honeybush tea phenolics. Electrophoresis 2016; 38:897-905. [PMID: 27921291 DOI: 10.1002/elps.201600349] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 11/22/2016] [Accepted: 11/25/2016] [Indexed: 12/11/2022]
Abstract
Rooibos and honeybush are popular herbal teas produced from the shrubs of Aspalathus linearis and Cyclopia spp., respectively, which are indigenous to South Africa. Both herbal teas are rich in polyphenols and their consumption is associated with several health benefits, partly ascribed to their phenolic constituents. Quantification of phenolics in extracts and teas for quality control and research purposes is generally performed using HPLC, although dedicated and often species-specific methods are required. CE offers an attractive alternative to HPLC for the analysis of phenolics, with potential benefits in terms of efficiency, speed and operating costs. In this contribution, we report quantitative CZE methods for the analysis of the principal honeybush and rooibos phenolics. Optimal separation for honeybush and rooibos phenolics was achieved in 21 and 32 min, respectively, with good linearity and repeatability. Quantitative data for extracts of "unfermented" and "fermented" rooibos and two honeybush species were statistically comparable with those obtained by HPLC for the majority of compounds. The developed methods demonstrated their utility for the comparison of phenolic contents between different species and as a function of manufacturing processes, thus offering cost effective, although less sensitive and robust, alternatives to HPLC analysis.
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Affiliation(s)
- William J Arries
- Department of Chemistry and Polymer Science, Stellenbosch University, Matieland, South Africa
| | - Andreas G J Tredoux
- Department of Chemistry and Polymer Science, Stellenbosch University, Matieland, South Africa
| | - Dalene de Beer
- Post-Harvest and Wine Technology Division, Agricultural Research Council, Stellenbosch, South Africa
| | - Elizabeth Joubert
- Post-Harvest and Wine Technology Division, Agricultural Research Council, Stellenbosch, South Africa.,Department of Food Science, Stellenbosch University, Matieland, South Africa
| | - André de Villiers
- Department of Chemistry and Polymer Science, Stellenbosch University, Matieland, South Africa
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de Villiers A, Venter P, Pasch H. Recent advances and trends in the liquid-chromatography–mass spectrometry analysis of flavonoids. J Chromatogr A 2016; 1430:16-78. [DOI: 10.1016/j.chroma.2015.11.077] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 11/25/2015] [Indexed: 12/22/2022]
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Cabooter D, Choikhet K, Lestremau F, Dittmann M, Desmet G. Towards a generic variable column length method development strategy for samples with a large variety in polarity. J Chromatogr A 2014; 1372C:174-186. [PMID: 25465015 DOI: 10.1016/j.chroma.2014.11.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 10/31/2014] [Accepted: 11/04/2014] [Indexed: 11/19/2022]
Abstract
The development of a novel set-up for the sequential analysis of compounds with a large variety in polarity on HILIC and reversed-phase columns, coupled in series, is discussed. For this purpose, a commercially available ultra-high performance LC system, equipped with two switching valves is employed. The switching valves allow connecting the HILIC and reversed-phase columns either in series or in parallel to the system. An interface to couple the HILIC and reversed-phase columns is developed and optimized. The sample is first injected onto a HILIC column. Apolar compounds in the sample are not retained and will elute close to or within the void volume of the HILIC column. Accurate switching of the valves allows redirecting these compounds towards a trap loop while more polar compounds are retained and separated on the HILIC column. After separation and detection of the polar compounds, the configuration of the valves is switched again to direct the apolar compounds from the trap loop towards a reversed-phase column for separation. To deal with the incompatibility of the mobile phases of HILIC and reversed-phase column separations, commercially available Jet weaver mixers are included in the set-up to allow for an intermediate solvent exchange. The proof-of-concept is demonstrated for the analysis of pharmaceuticals that can be found in waste water and surface water. It is demonstrated that the set-up provides robust analyses with peak capacities that are intermediate to one-dimensional and two-dimensional separations.
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Affiliation(s)
- Deirdre Cabooter
- KU Leuven - University of Leuven, Department for Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis, B-3000 Leuven, Belgium.
| | | | | | - Monika Dittmann
- Agilent Technologies R&D, Hewlett-Packard-Strasse 8, Waldbronn, Germany
| | - Gert Desmet
- Vrije Universiteit Brussel, Department of Chemical Engineering, Pleinlaan 2, 1050 Brussel, Belgium
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Cabooter D, Wuyts B, Desmet G, Van Schepdael A, Lynen F. Variable column length method development strategy for amino acid analysis in serum samples of neonates with metabolic disorders. J Chromatogr A 2013; 1292:229-38. [DOI: 10.1016/j.chroma.2013.03.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 02/03/2013] [Accepted: 03/07/2013] [Indexed: 11/16/2022]
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Beelders T, Kalili KM, Joubert E, de Beer D, de Villiers A. Comprehensive two-dimensional liquid chromatographic analysis of rooibos (Aspalathus linearis
) phenolics. J Sep Sci 2012; 35:1808-20. [DOI: 10.1002/jssc.201200060] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Theresa Beelders
- Department of Food Science; Stellenbosch University; Matieland South Africa
| | - Kathithileni M. Kalili
- Department of Chemistry and Polymer Science; Stellenbosch University; Matieland South Africa
| | - Elizabeth Joubert
- Department of Food Science; Stellenbosch University; Matieland South Africa
- Post-Harvest and Wine Technology Division; Agricultural Research Council Infruitec-Nietvoorbij; Stellenbosch South Africa
| | - Dalene de Beer
- Post-Harvest and Wine Technology Division; Agricultural Research Council Infruitec-Nietvoorbij; Stellenbosch South Africa
| | - André de Villiers
- Department of Chemistry and Polymer Science; Stellenbosch University; Matieland South Africa
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Beelders T, Sigge GO, Joubert E, de Beer D, de Villiers A. Kinetic optimisation of the reversed phase liquid chromatographic separation of rooibos tea (Aspalathus linearis) phenolics on conventional high performance liquid chromatographic instrumentation. J Chromatogr A 2012; 1219:128-39. [DOI: 10.1016/j.chroma.2011.11.012] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 11/01/2011] [Accepted: 11/06/2011] [Indexed: 02/02/2023]
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