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Effect of spacer alkyl chain length on retention among three imidazolium stationary phases under various modes in high performance liquid chromatography. J Chromatogr A 2022; 1685:463646. [DOI: 10.1016/j.chroma.2022.463646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 10/25/2022] [Accepted: 11/10/2022] [Indexed: 11/14/2022]
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Ovchinnikov DV, Falev DI, Solovyova PV, Ul'yanovskii NV, Kosyakov DS. Rapid determination of phthalates in paper products by supercritical fluid chromatography / tandem mass spectrometry. J Sep Sci 2022; 45:4116-4127. [PMID: 36099363 DOI: 10.1002/jssc.202200404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 11/09/2022]
Abstract
Phthalic acid esters (PAEs) are widely used as components of industrial and consumer products including paper and cardboard packaging materials contacting with food or human skin. Being endocrine-disrupting chemicals, PAEs have a negative effect on human health and must be controlled in pulp and paper products. In the present study, supercritical fluid chromatography - tandem mass spectrometry in combination with pressurized liquid extraction was proposed for PAEs determination in such objects. Octadecyl stationary phase with non-endcapped silanol groups ensured rapid (4 min) separation of the ten priority PAEs in isocratic elution mode and allowed for effective elimination of interferences from the trace impurities of PAEs in the mobile phase. The attained LOQs are in the range of 0.7-10 μg/L in extracts and 0.02-0.3 μg/g in paper and cardboard samples. The developed method is distinguished by analysis rapidity, easy sample preparation procedure, high selectivity, low susceptibility to mobile phase contamination with analytes, low cost and environmental friendliness due to the use of carbon dioxide as a main component of the mobile phase. The method was successfully tested on real samples of toilet paper and food packaging paper and cardboard in which eight analytes were found at the levels of 0.03-43.5 μg/g. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Denis V Ovchinnikov
- Core Facility Center «Arktika», M.V. Lomonosov Northern (Arctic) Federal University, Arkhangelsk, Russia
| | - Danil I Falev
- Core Facility Center «Arktika», M.V. Lomonosov Northern (Arctic) Federal University, Arkhangelsk, Russia
| | - Polina V Solovyova
- Core Facility Center «Arktika», M.V. Lomonosov Northern (Arctic) Federal University, Arkhangelsk, Russia
| | - Nikolay V Ul'yanovskii
- Core Facility Center «Arktika», M.V. Lomonosov Northern (Arctic) Federal University, Arkhangelsk, Russia
| | - Dmitry S Kosyakov
- Core Facility Center «Arktika», M.V. Lomonosov Northern (Arctic) Federal University, Arkhangelsk, Russia
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Česla P, Hájek T, Urban J, Holčapek M. Liquid chromatography at the university of pardubice: a tribute to Professor Pavel Jandera. J Sep Sci 2022; 45:3214-3231. [PMID: 35932491 DOI: 10.1002/jssc.202200618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/03/2022] [Accepted: 08/03/2022] [Indexed: 11/12/2022]
Abstract
Pavel Jandera was a world-leading analytical chemist who devoted his entire professional life to research in the field of high-performance liquid chromatography. During all his scientific career, he worked at the Department of Analytical Chemistry at the University of Pardubice, Czech Republic. His greatest contribution to the field of liquid chromatography was the introduction of a comprehensive theory of liquid chromatography with programmed elution conditions. He was also involved in the research of gradient elution techniques in preparative chromatography, modeling of retention and selectivity in various phase systems, preparation of organic monolithic microcolumns and, last but not least, in the development of theory and practical applications of two-dimensional liquid chromatography, mainly in the comprehensive form. In this review article, we have tried to capture the highlights of his scientific career and provide the readers with a detailed overview of Pavel Jandera's contribution to the evolution of separation sciences. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Petr Česla
- Faculty of Chemical Technology, Department of Analytical Chemistry, University of Pardubice, Studentská 573, Pardubice, CZ-53210, Czech Republic
| | - Tomáš Hájek
- Faculty of Chemical Technology, Department of Analytical Chemistry, University of Pardubice, Studentská 573, Pardubice, CZ-53210, Czech Republic
| | - Jiří Urban
- Faculty of Science, Department of Chemistry, Masaryk University, Kamenice 5, Brno, CZ-62500, Czech Republic
| | - Michal Holčapek
- Faculty of Chemical Technology, Department of Analytical Chemistry, University of Pardubice, Studentská 573, Pardubice, CZ-53210, Czech Republic
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Gutierrez Reyes CD, Jiang P, Donohoo K, Atashi M, Mechref YS. Glycomics and glycoproteomics: Approaches to address isomeric separation of glycans and glycopeptides. J Sep Sci 2020; 44:403-425. [PMID: 33090644 DOI: 10.1002/jssc.202000878] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/29/2020] [Accepted: 10/06/2020] [Indexed: 11/11/2022]
Abstract
Changes in the glycome of human proteins and cells are associated with the progression of multiple diseases such as Alzheimer's, diabetes mellitus, many types of cancer, and those caused by viruses. Consequently, several studies have shown essential modifications to the isomeric glycan moieties for diseases in different stages. However, the elucidation of extensive isomeric glycan profiles remains challenging because of the lack of analytical techniques with sufficient resolution power to separate all glycan and glycopeptide iso-forms. Therefore, the development of sensitive and accurate approaches for the characterization of all the isomeric forms of glycans and glycopeptides is essential to tracking the progression of pathology in glycoprotein-related diseases. This review describes the isomeric separation achievements reported in glycomics and glycoproteomics in the last decade. It focuses on the mass spectrometry-based analytical strategies, stationary phases, and derivatization techniques that have been developed to enhance the separation mechanisms in liquid chromatography systems and the detection capabilities of mass spectrometry systems.
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Affiliation(s)
| | - Peilin Jiang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, USA
| | - Kaitlyn Donohoo
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, USA
| | - Mojgan Atashi
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, USA
| | - Yehia S Mechref
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, USA
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den Uijl MJ, Schoenmakers PJ, Pirok BWJ, van Bommel MR. Recent applications of retention modelling in liquid chromatography. J Sep Sci 2020; 44:88-114. [PMID: 33058527 PMCID: PMC7821232 DOI: 10.1002/jssc.202000905] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/02/2020] [Accepted: 10/12/2020] [Indexed: 11/18/2022]
Abstract
Recent applications of retention modelling in liquid chromatography (2015–2020) are comprehensively reviewed. The fundamentals of the field, which date back much longer, are summarized. Retention modeling is used in retention‐mechanism studies, for determining physical parameters, such as lipophilicity, and for various more‐practical purposes, including method development and optimization, method transfer, and stationary‐phase characterization and comparison. The review focusses on the effects of mobile‐phase composition on retention, but other variables and novel models to describe their effects are also considered. The five most‐common models are addressed in detail, i.e. the log‐linear (linear‐solvent‐strength) model, the quadratic model, the log–log (adsorption) model, the mixed‐mode model, and the Neue–Kuss model. Isocratic and gradient‐elution methods are considered for determining model parameters and the evaluation and validation of fitted models is discussed. Strategies in which retention models are applied for developing and optimizing one‐ and two‐dimensional liquid chromatographic separations are discussed. The review culminates in some overall conclusions and several concrete recommendations.
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Affiliation(s)
- Mimi J den Uijl
- Analytical Chemistry Group, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Amsterdam, The Netherlands.,Centre for Analytical Sciences Amsterdam (CASA), Amsterdam, The Netherlands
| | - Peter J Schoenmakers
- Analytical Chemistry Group, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Amsterdam, The Netherlands.,Centre for Analytical Sciences Amsterdam (CASA), Amsterdam, The Netherlands
| | - Bob W J Pirok
- Analytical Chemistry Group, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Amsterdam, The Netherlands.,Centre for Analytical Sciences Amsterdam (CASA), Amsterdam, The Netherlands
| | - Maarten R van Bommel
- Analytical Chemistry Group, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Amsterdam, The Netherlands.,Centre for Analytical Sciences Amsterdam (CASA), Amsterdam, The Netherlands.,University of Amsterdam, Faculty of Humanities, Conservation and Restoration of Cultural Heritage, Amsterdam, The Netherlands
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Cis and trans isomers of the vitamin menaquinone-7: which one is biologically significant? Appl Microbiol Biotechnol 2020; 104:2765-2776. [PMID: 32009201 DOI: 10.1007/s00253-020-10409-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 01/15/2020] [Accepted: 01/23/2020] [Indexed: 12/20/2022]
Abstract
Recently, several studies have indicated that an adequate intake of menaquinone-7 (MK-7) offers numerous health benefits. However, the low availability of MK-7 in the diet necessitates the development of dietary supplements or functional food products to complement natural food sources and meet the daily intake requirements. Like most biological molecules, MK-7 can exist as geometric isomers that can occur in the cis, trans, and cis/trans forms; however, only the all-trans form is biologically significant. MK-7 is traditionally produced through bacterial fermentation, but various synthetic preparations have lately become available. The isomer composition in the final product is influenced by numerous factors, including the methods of production and purification, as well as particular environmental and storage conditions. The MK-7 profile obtained from the various production methods has not yet been elucidated, and the ideal method for the synthesis of the all-trans form of the vitamin is also debatable. Consequently, the quantification of the MK-7 profile of various products is necessary to develop an understanding of the factors that influence the proportion of isomers that are obtained in different preparations. Several possible methods exist for the quantification of MK-7 isomers, and of these, liquid chromatography in conjunction with mass spectrometry techniques appears to be the most promising. Evaluation of the isomer composition is an important consideration, as only the all-trans form sustains biological activity. Furthermore, knowledge of the prominent factors that influence the MK-7 composition may also enable their manipulation to obtain a more favorable MK-7 profile in the final product.
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Sander LC, Rimmer CA, Wilson WB. Characterization of triacontyl (C-30) liquid chromatographic columns. J Chromatogr A 2019; 1614:460732. [PMID: 31836308 DOI: 10.1016/j.chroma.2019.460732] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/08/2019] [Accepted: 11/24/2019] [Indexed: 11/18/2022]
Abstract
Differences in the characteristics of seventeen commercial C-30 liquid chromatographic columns were studied for the separation of carotenoid isomers. A mixture consisting of nine xanthophyll and hydrocarbon carotenoids were separated under conditions carefully chosen to reveal changes in selectivity. The influence of the mobile phase composition, column temperature, and mobile phase flow rate were evaluated. Shape selectivity was characterized with Standard Reference Material (SRM) 869b Column Selectivity Test Mixture, for correlation with carotenoid retention behavior. Regular changes were observed across a broad spectrum of shape selectivity characteristics as indicated by SRM 869b. Better separations of carotenoid isomers were achieved with C-30 columns than were possible with C-18 columns, even after optimization of separation conditions.
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Affiliation(s)
- Lane C Sander
- National Institute of Standards and Technology (NIST), Chemical Sciences Division, 100 Bureau Drive, MS 8392, Gaithersburg, MD 20899-8392, USA.
| | - Catherine A Rimmer
- National Institute of Standards and Technology (NIST), Chemical Sciences Division, 100 Bureau Drive, MS 8392, Gaithersburg, MD 20899-8392, USA
| | - Walter B Wilson
- National Institute of Standards and Technology (NIST), Chemical Sciences Division, 100 Bureau Drive, MS 8392, Gaithersburg, MD 20899-8392, USA
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Criscuolo A, Zeller M, Cook K, Angelidou G, Fedorova M. Rational selection of reverse phase columns for high throughput LC–MS lipidomics. Chem Phys Lipids 2019; 221:120-127. [DOI: 10.1016/j.chemphyslip.2019.03.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/07/2019] [Accepted: 03/14/2019] [Indexed: 12/17/2022]
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