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Patel R, Kotadiya R. Stability-indicating green HPLC method for fixed-dose tablets containing remogliflozin etabonate and teneligliptin: an AQbD approach. Drug Dev Ind Pharm 2024:1-13. [PMID: 39226128 DOI: 10.1080/03639045.2024.2400199] [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: 05/22/2024] [Revised: 08/23/2024] [Accepted: 08/29/2024] [Indexed: 09/05/2024]
Abstract
BACKGROUND In June 2021, the Central Drug Standards Control Organization approved a fixed-dose combination tablet containing remogliflozin etabonate (100 mg) and teneligliptin (10 mg) to manage type II diabetes. OBJECTIVE This study aims to develop a stability-indicating RP-HPLC method for quantifying remogliflozin etabonate and teneligliptin in tablet formulations via analytical quality by design (AQbD) principles. METHODS Risk assessment, Plackett-Burman design, and central composite design were employed to understand the impact of independent variables on critical analytical attributes. The stationary phase was a HyperClone BDS C18 column, and the mobile phase consisted of acetonitrile and phosphate buffer (20 mM, pH 5) at a 45:55% (v/v) ratio. RESULTS The method, validated per ICH Q2 (R1), resulted in retention times of 3.395 and 12.308 min for teneligliptin and remogliflozin etabonate, respectively. Forced degradation studies confirmed robustness, with clear peak separation and no interference from degradation products. The AGREE score of 0.65 supports its green applicability for tablet analysis in quality control. CONCLUSION The AQbD-assisted RP-HPLC method developed in this study offers environmental friendliness, efficient separation with well-defined peaks, and simple mobile phase combination.
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Affiliation(s)
- Raj Patel
- Department of Pharmaceutical Quality Assurance, Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology, Changa, India
| | - Rajendra Kotadiya
- Department of Pharmaceutical Quality Assurance, Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology, Changa, India
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Mallik AK, Montero L, Meckelmann SW, Schmitz OJ. Facile preparation of embedded polar group-containing pentafluorophenyl stationary phases for highly selective separations of diverse analytes. J Chromatogr A 2024; 1717:464688. [PMID: 38354595 DOI: 10.1016/j.chroma.2024.464688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/22/2024] [Accepted: 01/25/2024] [Indexed: 02/16/2024]
Abstract
Pentafluorophenyl (PFP) stationary phase is one of the most important phases after the C18 phase in terms of its applications. Three embedded polar groups (EPG)-containing stationary phases were newly synthesized to act the EPGs as additional interaction sites. The silica surface was initially modified with (3-aminopropyl)trimethoxysilane (APS). The APS-modified silicas were coupled with 2,3,4,5,6-pentafluorobenzoic acid, 2,3,4,5,6-pentafluorophenylacetic acid, and 2,3,4,5,6-pentafluoro-anilino(oxo)acetic acid to obtain Sil-PFP-BA, Sil-PFP-AA, and Sil-PFP-AN phases, respectively. The new phases were characterized by elemental analysis, ATR-FTIR, scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The phases were evaluated with the Tanaka and Neue tests in reversed-phase liquid chromatography (RPLC). In addition, they were characterized as hydrophilic phases by the Tanaka test protocol used in hydrophilic interaction chromatography (HILIC) separation mode. The Sil-PFP-AA phase showed the highest molecular shape selectivity in RPLC, while Sil-PFP-AN achieved the highest separability in HILIC compared to the commercial PFP reference column. The Sil-PFP-AA phase was successfully applied for the analysis of capsaicinoids from real samples of fresh chili peppers (Capsicum spp.) in RPLC and the Sil-PFP-AN phase for vitamin C (ascorbic acid) in HILIC.
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Affiliation(s)
- Abul K Mallik
- Applied Analytical Chemistry, University of Duisburg-Essen, Universitaetsstr. 5, 45141 Essen, Germany; Department of Applied Chemistry and Chemical Engineering, University of Dhaka, Dhaka 1000, Bangladesh.
| | - Lidia Montero
- Applied Analytical Chemistry, University of Duisburg-Essen, Universitaetsstr. 5, 45141 Essen, Germany; Institute of Food Science Research - CIAL (CSIC-UAM), Calle Nicolas Cabrera 9, 28049 Madrid, Spain
| | - Sven W Meckelmann
- Applied Analytical Chemistry, University of Duisburg-Essen, Universitaetsstr. 5, 45141 Essen, Germany
| | - Oliver J Schmitz
- Applied Analytical Chemistry, University of Duisburg-Essen, Universitaetsstr. 5, 45141 Essen, Germany.
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Song JG, Baral KC, Kim GL, Park JW, Seo SH, Kim DH, Jung DH, Ifekpolugo NL, Han HK. Quantitative analysis of therapeutic proteins in biological fluids: recent advancement in analytical techniques. Drug Deliv 2023; 30:2183816. [PMID: 36880122 PMCID: PMC10003146 DOI: 10.1080/10717544.2023.2183816] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 02/06/2023] [Indexed: 03/08/2023] Open
Abstract
Pharmaceutical application of therapeutic proteins has been continuously expanded for the treatment of various diseases. Efficient and reliable bioanalytical methods are essential to expedite the identification and successful clinical development of therapeutic proteins. In particular, selective quantitative assays in a high-throughput format are critical for the pharmacokinetic and pharmacodynamic evaluation of protein drugs and to meet the regulatory requirements for new drug approval. However, the inherent complexity of proteins and many interfering substances presented in biological matrices have a great impact on the specificity, sensitivity, accuracy, and robustness of analytical assays, thereby hindering the quantification of proteins. To overcome these issues, various protein assays and sample preparation methods are currently available in a medium- or high-throughput format. While there is no standard or universal approach suitable for all circumstances, a liquid chromatography-tandem mass spectrometry (LC-MS/MS) assay often becomes a method of choice for the identification and quantitative analysis of therapeutic proteins in complex biological samples, owing to its high sensitivity, specificity, and throughput. Accordingly, its application as an essential analytical tool is continuously expanded in pharmaceutical R&D processes. Proper sample preparation is also important since clean samples can minimize the interference from co-existing substances and improve the specificity and sensitivity of LC-MS/MS assays. A combination of different methods can be utilized to improve bioanalytical performance and ensure more accurate quantification. This review provides an overview of various protein assays and sample preparation methods, with particular emphasis on quantitative protein analysis by LC-MS/MS.
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Affiliation(s)
- Jae Geun Song
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Kshitis Chandra Baral
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Gyu-Lin Kim
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Ji-Won Park
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Soo-Hwa Seo
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Da-Hyun Kim
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Dong Hoon Jung
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Nonye Linda Ifekpolugo
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
| | - Hyo-Kyung Han
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang, Korea
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Plachká K, Pilařová V, Horáček O, Gazárková T, Vlčková HK, Kučera R, Nováková L. Columns in analytical-scale supercritical fluid chromatography: From traditional to unconventional chemistries. J Sep Sci 2023; 46:e2300431. [PMID: 37568246 DOI: 10.1002/jssc.202300431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/31/2023] [Accepted: 08/01/2023] [Indexed: 08/13/2023]
Abstract
Within this review, we thoroughly explored supercritical fluid chromatography (SFC) columns used across > 3000 papers published from the first study carried out under SFC conditions in 1962 to the end of 2022. We focused on the open tubular capillary, packed capillary, and packed columns, their chemistries, dimensions, and trends in used stationary phases with correlation to their specific interactions, advantages, drawbacks, used instrumentation, and application field. Since the 1990s, packed columns with liquid chromatography and SFC-dedicated stationary phases for chiral and achiral separation are predominantly used. These stationary phases are based on silica support modified with a wide range of chemical moieties. Moreover, numerous unconventional stationary phases were evaluated, including porous graphitic carbon, titania, zirconia, alumina, liquid crystals, and ionic liquids. The applications of unconventional stationary phases are described in detail as they bring essential findings required for further development of the supercritical fluid chromatography technique.
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Affiliation(s)
- Kateřina Plachká
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Veronika Pilařová
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Ondřej Horáček
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Taťána Gazárková
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Hana Kočová Vlčková
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Radim Kučera
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Lucie Nováková
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
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Alsaeedi M, Alghamdi H, Hayes P, Hogan AM, Gilchrist ES, Dowling KG, English JA, Glennon JD. Evaluation of hydrophilic interaction chromatography versus reversed-phase chromatography for fast aqueous species distribution analysis of Nickel(II)-Histidine complex species. J Chromatogr A 2023; 1693:463857. [PMID: 36812776 DOI: 10.1016/j.chroma.2023.463857] [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: 07/20/2022] [Revised: 01/30/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023]
Abstract
Nickel (Ni) is a trace heavy metal of importance in biological and environmental systems, with well documented allergy and carcinogenic effects in humans. With Ni(II) as the dominant oxidation state, the elucidation of the coordination mechanisms and labile complex species responsible for its transportation, toxicity, allergy, and bioavailability is key to understanding its biological effects and location in living systems. Histidine (His) is an essential amino acid that contributes to protein structure and activity and in the coordination of Cu(II) and Ni(II) ions. The aqueous low molecular weight Ni(II)-Histidine complex consists primarily of two stepwise complex species Ni(II)(His)1 and Ni(II)(His)2 in the pH range of 4 to 12. Four chromatographic columns, including the superficially porous Poro-shell EC-C18, Halo RP-amide and Poro-shell bare silica-HILIC columns, alongside a Zic-cHILIC fully porous column, were evaluated for the fast separation of the individual Ni(II)-Histidine species. Of these the Zic-cHILIC exhibited high efficiency and selectivity to distinguish between the two stepwise species Ni(II)His1 and Ni(II)His2 as well as free Histidine, with a fast separation within 120 s at a flow rate of 1 ml/min. This HILIC method utilizing the Zic-cHILIC column was initially optimized for the simultaneous analysis of Ni(II)-His-species using UV detection with a mobile phase consisting of 70% ACN and sodium acetate buffer at wwpH 6. Furthermore, the aqueous metal complex species distribution analysis for the low molecular weight Ni(II)-histidine system was chromatographically determined at various metal-ligand ratios and as a function of pH. The identities of Ni(II)His1 and Ni(II)-His2 species were confirmed using HILIC electrospray ionization- mass spectrometry (HILIC-ESI-MS) at negative mode.
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Affiliation(s)
- Majidah Alsaeedi
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), School of Chemistry, and the Analytical & Biological Chemistry Research Facility (ABCRF), University College Cork, Western Road, Cork T12 YN60, Ireland
| | - Huda Alghamdi
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), School of Chemistry, and the Analytical & Biological Chemistry Research Facility (ABCRF), University College Cork, Western Road, Cork T12 YN60, Ireland
| | - Phyllis Hayes
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), School of Chemistry, and the Analytical & Biological Chemistry Research Facility (ABCRF), University College Cork, Western Road, Cork T12 YN60, Ireland
| | - Anna M Hogan
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), School of Chemistry, and the Analytical & Biological Chemistry Research Facility (ABCRF), University College Cork, Western Road, Cork T12 YN60, Ireland
| | - Elizabeth S Gilchrist
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), School of Chemistry, and the Analytical & Biological Chemistry Research Facility (ABCRF), University College Cork, Western Road, Cork T12 YN60, Ireland
| | - Kirsten G Dowling
- Department of Anatomy & Neuroscience, Paediatric Academic Unit, University College Cork and INFANT Centre, Cork University Hospital, Western Gateway Building, Cork, Ireland
| | - Jane A English
- Department of Anatomy & Neuroscience, Paediatric Academic Unit, University College Cork and INFANT Centre, Cork University Hospital, Western Gateway Building, Cork, Ireland
| | - Jeremy D Glennon
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), School of Chemistry, and the Analytical & Biological Chemistry Research Facility (ABCRF), University College Cork, Western Road, Cork T12 YN60, Ireland.
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Scrosati PM, Konermann L. Atomistic Details of Peptide Reversed-Phase Liquid Chromatography from Molecular Dynamics Simulations. Anal Chem 2023; 95:3892-3900. [PMID: 36745777 DOI: 10.1021/acs.analchem.2c05667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Peptide separations by reversed-phase liquid chromatography (RPLC) are an integral part of bottom-up proteomics. These separations typically employ C18 columns with water/acetonitrile gradient elution in the presence of formic acid. Despite the widespread use of such workflows, the exact nature of peptide interactions with the stationary and mobile phases is poorly understood. Here, we employ microsecond molecular dynamics (MD) simulations to uncover details of peptide RPLC. We examined two tryptic peptides, a hydrophobic and a hydrophilic species, in a slit pore lined with C18 chains that were grafted onto SiO2 support. Our simulations explored peptide trapping, followed by desorption and elution. Trapping in an aqueous mobile phase was initiated by C18 contacts with Lys butyl moieties. This was followed by extensive anchoring of nonpolar side chains (Leu/Ile/Val) in the C18 layer. Exposure to water/acetonitrile triggered peptide desorption in a stepwise fashion; charged sites close to the termini were the first to lift off, followed by the other residues. During water/acetonitrile elution, both peptides preferentially resided close to the pore center. The hydrophilic peptide exhibited no contacts with the stationary phase under these conditions. In contrast, the hydrophobic species underwent multiple transient Leu/Ile/Val binding interactions with C18 chains. These nonpolar interactions represent the foundation of differential peptide retention, in agreement with the experimental elution behavior of the two peptides. Extensive peptide/formate ion pairing was observed in water/acetonitrile, particularly at N-terminal sites. Overall, this work uncovers an unprecedented level of RPLC molecular details, paving the way for MD simulations as a future tool for improving retention prediction algorithms and for the design of novel column materials.
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Affiliation(s)
- Pablo M Scrosati
- Department of Chemistry, The University of Western Ontario, London, Ontario, N6A 5B7, Canada
| | - Lars Konermann
- Department of Chemistry, The University of Western Ontario, London, Ontario, N6A 5B7, Canada
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7
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Development and validation of a simple and rapid HILIC-MS/MS method for the quantification of low-abundant lysoglycerophospholipids in human plasma. Anal Bioanal Chem 2023; 415:411-425. [PMID: 36370204 DOI: 10.1007/s00216-022-04421-9] [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: 08/02/2022] [Revised: 10/31/2022] [Accepted: 11/02/2022] [Indexed: 11/15/2022]
Abstract
Lysoglycerophospholipids (Lyso-GPLs) are an essential class of signaling lipids with potential roles in human diseases, such as cancer, central nervous system diseases, and atherosclerosis. Current methods for the quantification of Lyso-GPLs involve complex sample pretreatment, long analysis times, and insufficient validation, which hinder the research of Lyso-GPLs in human studies, especially for Lyso-GPLs with low abundance in human plasma such as lysophosphatidic acid (LPA), lysophosphatidylinositol (LPI), lysophosphatidylglycerol (LPG), lysophosphatidylserine (LysoPS), lyso-platelet-activating factor (LysoPAF), and cyclic phosphatidic acid (cPA). Herein, we report the development and validation of a simple and rapid liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the quantification of Lyso-GPLs with low abundance in plasma. Protein precipitation using MeOH for Lyso-GPL extraction, quick separation (within 18 min) based on hydrophilic interaction liquid chromatography (HILIC), and sensitive MS detection under dynamic multiple reaction monitoring (dMRM) mode enabled efficient quantification of 22 Lyso-GPLs including 2 cPA, 4 LPG, 11 LPA, 2 LysoPS, and 3 LysoPAF in 50 μL of human plasma. The present method showed good linearity (goodness of fit, 0.99823-0.99995), sensitivity (lower limit of quantification, 0.03-14.06 ng/mL), accuracy (73-117%), precision (coefficient of variation ≤ 28%), carryover (≤ 17%), recovery (80-110%), and stability (83-123%). We applied the method in an epidemiological study and report concentrations of 18 Lyso-GPLs in 567 human plasma samples comparable to those of previous studies. Significant negative associations of LysoPAF C18, LysoPAF C18:1, and LysoPAF C16 with homeostatic model assessment for insulin resistance (HOMA-IR) level were observed; this indicates possible roles of LysoPAF in glucose homeostasis. The application of the present method will improve understanding of the roles of circulating low-abundant Lyso-GPLs in health and diseases.
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Lenčo J, Jadeja S, Naplekov DK, Krokhin OV, Khalikova MA, Chocholouš P, Urban J, Broeckhoven K, Nováková L, Švec F. Reversed-Phase Liquid Chromatography of Peptides for Bottom-Up Proteomics: A Tutorial. J Proteome Res 2022; 21:2846-2892. [PMID: 36355445 DOI: 10.1021/acs.jproteome.2c00407] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The performance of the current bottom-up liquid chromatography hyphenated with mass spectrometry (LC-MS) analyses has undoubtedly been fueled by spectacular progress in mass spectrometry. It is thus not surprising that the MS instrument attracts the most attention during LC-MS method development, whereas optimizing conditions for peptide separation using reversed-phase liquid chromatography (RPLC) remains somewhat in its shadow. Consequently, the wisdom of the fundaments of chromatography is slowly vanishing from some laboratories. However, the full potential of advanced MS instruments cannot be achieved without highly efficient RPLC. This is impossible to attain without understanding fundamental processes in the chromatographic system and the properties of peptides important for their chromatographic behavior. We wrote this tutorial intending to give practitioners an overview of critical aspects of peptide separation using RPLC to facilitate setting the LC parameters so that they can leverage the full capabilities of their MS instruments. After briefly introducing the gradient separation of peptides, we discuss their properties that affect the quality of LC-MS chromatograms the most. Next, we address the in-column and extra-column broadening. The last section is devoted to key parameters of LC-MS methods. We also extracted trends in practice from recent bottom-up proteomics studies and correlated them with the current knowledge on peptide RPLC separation.
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Affiliation(s)
- Juraj Lenčo
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203/8, 500 05Hradec Králové, Czech Republic
| | - Siddharth Jadeja
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203/8, 500 05Hradec Králové, Czech Republic
| | - Denis K Naplekov
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203/8, 500 05Hradec Králové, Czech Republic
| | - Oleg V Krokhin
- Department of Internal Medicine, Manitoba Centre for Proteomics and Systems Biology, University of Manitoba, 799 JBRC, 715 McDermot Avenue, WinnipegR3E 3P4, Manitoba, Canada
| | - Maria A Khalikova
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203/8, 500 05Hradec Králové, Czech Republic
| | - Petr Chocholouš
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203/8, 500 05Hradec Králové, Czech Republic
| | - Jiří Urban
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00Brno, Czech Republic
| | - Ken Broeckhoven
- Department of Chemical Engineering (CHIS), Faculty of Engineering, Vrije Universiteit Brussel, Pleinlaan 2, 1050Brussel, Belgium
| | - Lucie Nováková
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203/8, 500 05Hradec Králové, Czech Republic
| | - František Švec
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203/8, 500 05Hradec Králové, Czech Republic
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Perchepied S, Ritchie H, Desmet G, Eeltink S. Insights in column packing processes of narrow bore and capillary-scale columns: Methodologies, driving forces, and separation performance – A tutorial review. Anal Chim Acta 2022; 1235:340563. [DOI: 10.1016/j.aca.2022.340563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/26/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022]
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Rauwolf S, Steegmüller T, Schwaminger SP, Berensmeier S. Purification of a peptide tagged protein via an affinity chromatographic process with underivatized silica. Eng Life Sci 2021; 21:549-557. [PMID: 34690628 PMCID: PMC8518568 DOI: 10.1002/elsc.202100019] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 05/06/2021] [Accepted: 05/25/2021] [Indexed: 11/11/2022] Open
Abstract
Silica is widely used for chromatography resins due to its high mechanical strength, column efficiency, easy manufacturing (i.e. controlled size and porosity), and low-cost. Despite these positive attributes to silica, it is currently used as a backbone for chromatographic resins in biotechnological downstream processing. The aim of this study is to show how the octapeptide (RH)4 can be used as peptide tag for high-purity protein purification on bare silica. The tag possesses a high affinity to deprotonated silanol groups because the tag's arginine groups interact with the surface via an ion pairing mechanism. A chromatographic workflow to purify GFP fused with (RH)4 could be implemented. Purities were determined by SDS-PAGE and RP-HPLC. The equilibrium binding capacity of the fusion protein GFP-(RH)4 on silica is 450 mg/g and the dynamic binding capacity around 3 mg/mL. One-step purification from clarified lysate achieved a purity of 93% and a recovery of 94%. Overloading the column enhances the purity to >95%. Static experiments with different buffers showed variability of the method making the system independent from buffer choice. Our designed peptide tag allows bare silica to be utilized in preparative chromatography for downstream bioprocessing; thus, providing a cost saving factor regarding expensive surface functionalization. Underivatized silica in combination with our (RH)4 peptide tag allows the purification of proteins, in all scales, without relying on complex resins.
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Affiliation(s)
- Stefan Rauwolf
- Department of Mechanical EngineeringTechnical University of MunichMunichGermany
| | - Tobias Steegmüller
- Department of Mechanical EngineeringTechnical University of MunichMunichGermany
| | | | - Sonja Berensmeier
- Department of Mechanical EngineeringTechnical University of MunichMunichGermany
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Baumans F, Hanozin E, Baiwir D, Decroo C, Wattiez R, De Pauw E, Eppe G, Mazzucchelli G. Liquid chromatography setup-dependent artefactual methionine oxidation of peptides: The importance of an adapted quality control process. J Chromatogr A 2021; 1654:462449. [PMID: 34399143 DOI: 10.1016/j.chroma.2021.462449] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 07/29/2021] [Accepted: 07/30/2021] [Indexed: 12/26/2022]
Abstract
In both biologics quality control experiments and protein post-translational modification studies, the analytical system used is not supposed to bring any artefactual modifications which could impair the results. In this work, we investigated oxidation of methionine-containing peptides during reversed-phase (RP) chromatographic separation. We first used a synthetic methionine-containing peptide to evaluate this artefactual phenomenon and then considered more complex samples (i.e., plasma and HeLa protein digests). The methionine oxidation levels of the peptides were systematically assessed and compared for the long-term use of the analytical column, the sample trapping time, the gradient length, the sample load and the nature of the stationary phase (HSS T3 from Waters, YMC Triart C18 from YMC Europe GmbH and BEH130 C18 from Waters). In addition to the oxidation of methionine in solution, we observed on the HSS T3 and the BEH130 stationary phases an additional broad peak corresponding to an on-column oxidized species. Considering the HSS T3 phase, our results highlight that the on-column oxidation level significantly increases with the age of the analytical column and the gradient length and reaches 56 % when a 1-year-old column set is used with a 180 min-long LC method. These levels go to 0 % and 18 % for the YMC Triart C18 and the BEH130 C18 phases respectively. Interestingly, the on-column oxidation proportion decreases as the injected sample load increases suggesting the presence of a discrete number of oxidation sites within the stationary phase of the analytical column. Those findings observed in different laboratories using distinct set of columns, albeit to varying degrees, strengthen the need for a standard of methionine-containing peptide that could be used as a quality control to appraise the status of the liquid chromatographic columns.
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Affiliation(s)
- France Baumans
- Mass Spectrometry Laboratory, MolSys Research Unit, University of Liege, Liege 4000, Belgium
| | - Emeline Hanozin
- Mass Spectrometry Laboratory, MolSys Research Unit, University of Liege, Liege 4000, Belgium
| | - Dominique Baiwir
- GIGA Proteomics Facility, University of Liege, Liege 4000, Belgium
| | - Corentin Decroo
- Proteomics and Microbiology Laboratory, University of Mons, Mons 7000, Belgium
| | - Ruddy Wattiez
- Proteomics and Microbiology Laboratory, University of Mons, Mons 7000, Belgium
| | - Edwin De Pauw
- Mass Spectrometry Laboratory, MolSys Research Unit, University of Liege, Liege 4000, Belgium
| | - Gauthier Eppe
- Mass Spectrometry Laboratory, MolSys Research Unit, University of Liege, Liege 4000, Belgium
| | - Gabriel Mazzucchelli
- Mass Spectrometry Laboratory, MolSys Research Unit, University of Liege, Liege 4000, Belgium.
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Geller S, Lieberman H, Kloss A, Ivanov AR. A systematic approach to development of analytical scale and microflow-based liquid chromatography coupled to mass spectrometry metabolomics methods to support drug discovery and development. J Chromatogr A 2021; 1642:462047. [PMID: 33744605 PMCID: PMC8035295 DOI: 10.1016/j.chroma.2021.462047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/26/2021] [Accepted: 03/02/2021] [Indexed: 12/21/2022]
Abstract
As the reliance on metabolic biomarkers within drug discovery and development increases, there is also an increased demand for global metabolomics methods to provide broad metabolome coverage and sensitivity towards differences in metabolite expression and reproducibility. A systematic approach is necessary for the development, and evaluation, of metabolomics methods using either conventional techniques or when establishing new methods that allow for additional gains in sensitivity and a reduction in requirements for amounts of a biological sample, such as those seen with methods based on microseparations. We developed a novel standard mixture and used a systematic approach for the development and optimization of optimal, ion-pair free, liquid chromatography-mass spectrometry (LC-MS) global profiling methods. These methods were scaled-down to microflow-based LC separations and compared with analytical flow ion-pairing reagent containing methods. Average peak volume improvements of 7- and 22-fold were observed in the positive and negative ionization mode microflow methods as compared to the ion-pairing reagent analytical flow methods, respectively. The linear range of the newly developed microflow methods showed up to a 10-fold increase in the lower limit of detection in the negative ionization mode. The developed microflow LC-MS methods were further evaluated using wild-type mouse plasma where up to a 9-fold increase in peak volume was observed.
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Affiliation(s)
| | | | - Alla Kloss
- Sanofi, Waltham, MA 02451, United States
| | - Alexander R Ivanov
- Barnett Institute of Chemical and Biological Analysis, Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115, United States.
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Laskowska M, Pastukh O, Fedorchuk A, Schabikowski M, Kowalczyk P, Zalasiński M, Laskowski Ł. Nanostructured Silica with Anchoring Units: The 2D Solid Solvent for Molecules and Metal Ions. Int J Mol Sci 2020; 21:E8137. [PMID: 33143359 PMCID: PMC7663599 DOI: 10.3390/ijms21218137] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 10/21/2020] [Accepted: 10/27/2020] [Indexed: 01/27/2023] Open
Abstract
The ability to organize, separate and manipulate individual molecules and ions on a surface opens up almost unlimited opportunities. However, it often requires complex techniques and a proper support material. With this in mind, we show a new concept of 2D solid solvents and review a simple and efficient procedure which is based on nanostructured forms of silica with anchoring units. We describe silica supports, such as spherical nanoparticles and mesoporous silica structures, as well as review the methods for chemical modification of the surface of silica with the functional groups. Finally, we present a few particular examples of the immobilization of molecules and ions on the surface of 2D solid solvents along with the experimental investigation of the obtained materials.
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Affiliation(s)
- Magdalena Laskowska
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Krakow, Poland; (M.L.); (O.P.); (A.F.); (M.S.)
| | - Oleksandr Pastukh
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Krakow, Poland; (M.L.); (O.P.); (A.F.); (M.S.)
| | - Andrii Fedorchuk
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Krakow, Poland; (M.L.); (O.P.); (A.F.); (M.S.)
| | - Mateusz Schabikowski
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Krakow, Poland; (M.L.); (O.P.); (A.F.); (M.S.)
| | - Paweł Kowalczyk
- Department of Animal Nutrition, The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 05-110 Jabłonna, Poland;
| | - Marcin Zalasiński
- Department of Intelligent Computer Systems, Czestochowa University of Technology, 42-200 Czestochowa, Poland;
| | - Łukasz Laskowski
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Krakow, Poland; (M.L.); (O.P.); (A.F.); (M.S.)
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14
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A novel process for the preparation of Cys-Si-NIPAM as a stationary phase of hydrophilic interaction liquid chromatography (HILIC). Talanta 2020; 218:121154. [DOI: 10.1016/j.talanta.2020.121154] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 05/08/2020] [Accepted: 05/10/2020] [Indexed: 01/28/2023]
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15
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Assefa AD, Hur OS, Ro NY, Lee JE, Hwang AJ, Kim BS, Rhee JH, Yi JY, Kim JH, Lee HS, Sung JS, Kim MK, Noh JJ. Fruit Morphology, Citrulline, and Arginine Levels in Diverse Watermelon ( Citrullus lanatus) Germplasm Collections. PLANTS 2020; 9:plants9091054. [PMID: 32824928 PMCID: PMC7569901 DOI: 10.3390/plants9091054] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/14/2020] [Accepted: 08/16/2020] [Indexed: 12/13/2022]
Abstract
Watermelon (Citrullus lanatus) is a non-seasonal, economically important, cucurbit cultivated throughout the world, with Asia as a continent contributing the most. As part of the effort to diversify watermelon genetic resources in the already cultivated group, this study was devoted to providing baseline data on morphological quality traits and health-beneficial phytonutrients of watermelon germplasm collections, thereby promoting watermelon research and cultivation programs. To this end, we reported morphological traits, citrulline, and arginine levels of watermelon genetic resources obtained from the gene bank of Agrobiodiversity Center, Republic of Korea, and discussed the relationships between each. Diverse characteristics were observed among many of the traits, but most of the genetic resources (>90%) were either red or pink-fleshed. Korean originated fruits contained intermediate levels of soluble solid content (SSC) while the USA, Russian, Tajikistan, Turkmenistan, Taiwan, and Uruguay originated fruits had generally the highest levels of soluble solids. The citrulline and arginine contents determined using the High Performance Liquid Chromatography (HPLC) method ranged from 6.9 to 52.1 mg/g (average, 27.3 mg/g) and 1.8 to 21.3 mg/g (average, 9.8 mg/g), respectively. The citrulline content determined using the Citrulline Assay Kit ranged from 6.5 to 42.8 mg/g (average, 27.0 mg/g). Resources with high citrulline and arginine levels contained low SSC, whereas red- and pink-colored flesh samples had less citrulline compared to yellow and orange.
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Affiliation(s)
- Awraris Derbie Assefa
- National Agrobiodiversity Center, National Institute of Agricultural Sciences, RDA, Jeonju 54874, Korea; (A.D.A.); (O.-S.H.); (N.-Y.R.); (J.-E.L.); (A.-J.H.); (B.-S.K.); (J.-H.R.); (J.-Y.Y.); (J.-H.K.)
| | - On-Sook Hur
- National Agrobiodiversity Center, National Institute of Agricultural Sciences, RDA, Jeonju 54874, Korea; (A.D.A.); (O.-S.H.); (N.-Y.R.); (J.-E.L.); (A.-J.H.); (B.-S.K.); (J.-H.R.); (J.-Y.Y.); (J.-H.K.)
| | - Na-Young Ro
- National Agrobiodiversity Center, National Institute of Agricultural Sciences, RDA, Jeonju 54874, Korea; (A.D.A.); (O.-S.H.); (N.-Y.R.); (J.-E.L.); (A.-J.H.); (B.-S.K.); (J.-H.R.); (J.-Y.Y.); (J.-H.K.)
| | - Jae-Eun Lee
- National Agrobiodiversity Center, National Institute of Agricultural Sciences, RDA, Jeonju 54874, Korea; (A.D.A.); (O.-S.H.); (N.-Y.R.); (J.-E.L.); (A.-J.H.); (B.-S.K.); (J.-H.R.); (J.-Y.Y.); (J.-H.K.)
| | - Ae-Jin Hwang
- National Agrobiodiversity Center, National Institute of Agricultural Sciences, RDA, Jeonju 54874, Korea; (A.D.A.); (O.-S.H.); (N.-Y.R.); (J.-E.L.); (A.-J.H.); (B.-S.K.); (J.-H.R.); (J.-Y.Y.); (J.-H.K.)
| | - Bich-Saem Kim
- National Agrobiodiversity Center, National Institute of Agricultural Sciences, RDA, Jeonju 54874, Korea; (A.D.A.); (O.-S.H.); (N.-Y.R.); (J.-E.L.); (A.-J.H.); (B.-S.K.); (J.-H.R.); (J.-Y.Y.); (J.-H.K.)
| | - Ju-Hee Rhee
- National Agrobiodiversity Center, National Institute of Agricultural Sciences, RDA, Jeonju 54874, Korea; (A.D.A.); (O.-S.H.); (N.-Y.R.); (J.-E.L.); (A.-J.H.); (B.-S.K.); (J.-H.R.); (J.-Y.Y.); (J.-H.K.)
| | - Jung-Yoon Yi
- National Agrobiodiversity Center, National Institute of Agricultural Sciences, RDA, Jeonju 54874, Korea; (A.D.A.); (O.-S.H.); (N.-Y.R.); (J.-E.L.); (A.-J.H.); (B.-S.K.); (J.-H.R.); (J.-Y.Y.); (J.-H.K.)
| | - Ji-Hyun Kim
- National Agrobiodiversity Center, National Institute of Agricultural Sciences, RDA, Jeonju 54874, Korea; (A.D.A.); (O.-S.H.); (N.-Y.R.); (J.-E.L.); (A.-J.H.); (B.-S.K.); (J.-H.R.); (J.-Y.Y.); (J.-H.K.)
| | - Ho-Sun Lee
- International Technology Cooperation Center, RDA, Jeonju 54875, Korea;
| | - Jung-Sook Sung
- Upland Crop Breeding Division, Department of Southern Area Crop Science, National Institute of Crop Science, RDA, Miryang 50424, Korea;
| | - Myung-Kon Kim
- Department of Food Science and Technology, Jeonbuk National University, Jeonju 54896, Korea;
| | - Jae-Jong Noh
- Jeonbuk Agricultural Research and Extension Services, Iksan 54591, Korea
- Correspondence: ; Tel.: +82-63-290-6121
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Huo Z, Chen L. Base‐deactivated and alkaline‐resistant chromatographic stationary phase based on functionalized polymethylsilsesquioxane microspheres. J Sep Sci 2019; 43:389-397. [DOI: 10.1002/jssc.201900634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 10/14/2019] [Accepted: 10/15/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Zhixia Huo
- School of Pharmaceutical Science & TechnologyTianjin University Tianjin P. R. China
| | - Lei Chen
- School of Pharmaceutical Science & TechnologyTianjin University Tianjin P. R. China
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Ali F, Malik AR, Cheong WJ, Rehman NUR. Demonstration of high separation efficiency for polystyrene-modified sub-1 µm particles originating from silica monolith under isocratic elution mode in liquid chromatography. J LIQ CHROMATOGR R T 2019. [DOI: 10.1080/10826076.2019.1665539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Faiz Ali
- Department of Chemistry, University of Malakand, Chakdara, Pakistan
- Department of Chemistry, Faculty of Basic and Applied Sciences, University of the Poonch, Rawalakot, Pakistan
- Department of Chemistry, Inha University, Incheon, South Korea
| | - Aamra Rafique Malik
- Department of Chemistry, Faculty of Basic and Applied Sciences, University of the Poonch, Rawalakot, Pakistan
| | - Won Jo Cheong
- Department of Chemistry, Inha University, Incheon, South Korea
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18
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High efficiency and simple preparation of polyacrylamide coated silica stationary phase for hydrophilic interaction liquid chromatography. J Chromatogr A 2019; 1605:360357. [PMID: 31345618 DOI: 10.1016/j.chroma.2019.07.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 07/05/2019] [Accepted: 07/06/2019] [Indexed: 11/23/2022]
Abstract
A polyacrylamide (PAM)-coated silica packing as a novel stationary phase for hydrophilic interaction liquid chromatography (HILIC) was produced firstly by thermal immobilization. The coated layer was formed by a simple and facile physical method that dipping silica spheres into a PAM solution and then stirring the mixture until the solution was evaporated absolutely, leaving a certain amount of PAM on the silica particles. Although there are no chemical bonds involved, the bleeding measurement and the background noise are acceptable. Polyacrylamide coated silica (PAM-Sil, mean diameter: 5 μm) demonstrated a good hydrophilic property and excellent separation efficiency, which was observed especially for several high polar analytes such as saccharides. It is much higher than bare silica or amino columns under the same conditions. Moreover the obtained stationary phase demonstrated good stability under our operation conditions. The specific preparing method offers an easy and economical way to manipulate the thickness of PAM coating and can be extended as a universal way to produce various polymer coated stationary phases with dipping-heating/stirring-evaporating procedure.
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19
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Ali A, Sun G, Kim JS, Cheong WJ. Polystyrene bound silica monolith particles of reduced size as stationary phase of excellent separation efficiency in high performance liquid chromatograhy. J Chromatogr A 2019; 1594:72-81. [DOI: 10.1016/j.chroma.2019.02.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 02/03/2019] [Accepted: 02/06/2019] [Indexed: 01/01/2023]
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20
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Stable-bond polymeric reversed-phase/weak anion-exchange mixed-mode stationary phases obtained by simultaneous functionalization and crosslinking of a poly(3-mercaptopropyl)methylsiloxane-film on vinyl silica via thiol-ene double click reaction. J Chromatogr A 2019; 1593:110-118. [DOI: 10.1016/j.chroma.2019.01.078] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 01/17/2019] [Accepted: 01/31/2019] [Indexed: 02/07/2023]
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21
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Zhang L, Fu P, Wang B, Liu M, Zhao Q, Pang X, Cui Z. Preparation of novel optically active polyamide@silica hybrid core-shell nanoparticles and application for enantioselective crystallization. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2018.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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22
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Qian K, Yang Z, Zhang F, Yang B, Dasgupta PK. Low-Bleed Silica-Based Stationary Phase for Hydrophilic Interaction Liquid Chromatography. Anal Chem 2018; 90:8750-8755. [DOI: 10.1021/acs.analchem.8b01796] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kun Qian
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East-China University of Science and Technology, Shanghai 200237, China
| | - Zhanqiang Yang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East-China University of Science and Technology, Shanghai 200237, China
| | - Feifang Zhang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East-China University of Science and Technology, Shanghai 200237, China
| | - Bingcheng Yang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East-China University of Science and Technology, Shanghai 200237, China
| | - Purnendu K. Dasgupta
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, Texas 76019-0065, United States
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Huo Z, Wan Q, Chen L. Synthesis and evaluation of porous polymethylsilsesquioxane microspheres as low silanol activity chromatographic stationary phase for basic compound separation. J Chromatogr A 2018; 1553:90-100. [DOI: 10.1016/j.chroma.2018.04.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 04/05/2018] [Accepted: 04/10/2018] [Indexed: 11/29/2022]
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24
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Development of Isocratic RP-HPLC Method for Separation and Quantification of L-Citrulline and L-Arginine in Watermelons. Int J Anal Chem 2018; 2018:4798530. [PMID: 29853897 PMCID: PMC5954852 DOI: 10.1155/2018/4798530] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 02/25/2018] [Accepted: 03/12/2018] [Indexed: 01/10/2023] Open
Abstract
Watermelons (Citrullus lanatus) are known to have sufficient amino acid content. In this study, watermelons grown and consumed in Malaysia were investigated for their amino acid content, L-citrulline and L-arginine, by the isocratic RP-HPLC method. Flesh and rind watermelons were juiced, and freeze-dried samples were used for separation and quantification of L-citrulline and L-arginine. Three different mobile phases, 0.7% H3P04, 0.1% H3P04, and 0.7% H3P04 : ACN (90 : 10), were tested on two different columns using Zorbax Eclipse XDB-C18 and Gemini C18 with a flow rate of 0.5 mL/min and a detection wavelength at 195 nm. Efficient separation with reproducible resolution of L-citrulline and L-arginine was achieved using 0.1% H3P04 on the Gemini C18 column. The method was validated and good linearity of L-citrulline and L-arginine was obtained with R2 = 0.9956, y = 0.1664x + 2.4142 and R2 = 0.9912, y = 0.4100x + 3.4850, respectively. L-citrulline content showed the highest concentration in red watermelon of flesh and rind juice extract (43.81 mg/g and 45.02 mg/g), whereas L-arginine concentration was lower than L-citrulline, ranging from 3.39 to 11.14 mg/g. The isocratic RP-HPLC method with 0.1% H3P04 on the Gemini C18 column proved to be efficient for separation and quantification of L-citrulline and L-arginine in watermelons.
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25
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Vaňková N, Česla P. Prediction of gradient retention data for hydrophilic interaction liquid chromatographic separation of native and fluorescently labeled oligosaccharides. J Chromatogr A 2017; 1485:82-89. [DOI: 10.1016/j.chroma.2017.01.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 01/09/2017] [Accepted: 01/11/2017] [Indexed: 11/30/2022]
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Douša M, Pivoňková V, Sýkora D. Optimization ofo-phtaldialdehyde/2-mercaptoethanol postcolumn reaction for the hydrophilic interaction liquid chromatography determination of memantine utilizing a silica hydride stationary phase. J Sep Sci 2016; 39:3145-55. [DOI: 10.1002/jssc.201600489] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 06/18/2016] [Accepted: 06/20/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Michal Douša
- Zentiva, k.s. Praha; a Sanofi Company; Prague Czech Republic
| | - Veronika Pivoňková
- Department of Analytical Chemistry; University of Chemistry and Technology; Prague Czech Republic
| | - David Sýkora
- Department of Analytical Chemistry; University of Chemistry and Technology; Prague Czech Republic
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27
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Borges EM, Volmer DA. Silica, Hybrid Silica, Hydride Silica and Non-Silica Stationary Phases for Liquid Chromatography. Part II: Chemical and Thermal Stability. J Chromatogr Sci 2015; 53:1107-22. [DOI: 10.1093/chromsci/bmu173] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Indexed: 12/28/2022]
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