1
|
Jing N, Shi J, Hu J, Sun Z. Comparative study on flavonoids from Tibetan medicinal plants Saussurea species using HPLC-DAD-ESI-MS. J LIQ CHROMATOGR R T 2023. [DOI: 10.1080/10826076.2023.2165096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Nianhua Jing
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing, China
| | - Junyou Shi
- College of Chemistry and Environmental Science, Qujing Normal University, Qujing, China
| | - Jiang Hu
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing, China
| | - Zhiwei Sun
- Key Laboratory of Life-Organic Analysis of Shandong Province, Qufu Normal University, Qufu, China
| |
Collapse
|
2
|
Silica Hydride: A Separation Material Every Analyst Should Know About. Molecules 2021; 26:molecules26247505. [PMID: 34946587 PMCID: PMC8708426 DOI: 10.3390/molecules26247505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/03/2021] [Accepted: 12/06/2021] [Indexed: 11/17/2022] Open
Abstract
This review describes the development, special features and applications of silica hydride-based stationary phases for HPLC. The unique surface of this material is in contrast to ordinary, standard silica, which is the material most frequently used in modern HPLC stationary phases. The standard silica surface contains mainly silanol (Si-OH) groups, while the silica hydride surface is instead composed of silicon-hydrogen groups, which is much more stable, less reactive and delivers different chromatographic and chemical characteristics. Other aspects of this material are described for each of the different bonded moieties available commercially. Some applications for each of these column types are also presented as well as a generic model for method development on silica hydride-based stationary phases.
Collapse
|
3
|
Strezsak SR, Beuning PJ, Skizim NJ. Versatile separation of nucleotides from bacterial cell lysates using strong anion exchange chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1188:123044. [PMID: 34864423 DOI: 10.1016/j.jchromb.2021.123044] [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: 09/14/2021] [Revised: 11/08/2021] [Accepted: 11/11/2021] [Indexed: 10/19/2022]
Abstract
Nucleotides exemplify some of the building blocks of life, comprising DNA & RNA, participating in processes such as cell signaling and metabolism, and serving as carriers of metabolic energy. The quantification of these compounds in biological samples is critical for researchers to understand complex systems. Herein, we demonstrate an anion exchange chromatography method utilizing a pH range of 8 to 10, which provides superior resolution and selectivity to previously reported methods and, more importantly, gives the flexibility to shift analyte selectivity if resolution between analytes is not optimal. We have applied the method to study the kinetics of the nucleotide pool in a bacterial cell-free lysate system that is producing RNA. Sample to sample runtimes are less than 18 min and recoveries greater than 96% were observed for all analytes through our methanol quench protocol with day-to-day variabilities less than 5%. This method reliably detects and quantifies all analytes that were expected to be observed in the process and helps lay the groundwork for future nucleotide research.
Collapse
Affiliation(s)
- Steven R Strezsak
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA 02115, United States; Greenlight Biosciences, Medford, MA, 02155, United States
| | - Penny J Beuning
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA 02115, United States
| | | |
Collapse
|
4
|
Straube H, Witte CP, Herde M. Analysis of Nucleosides and Nucleotides in Plants: An Update on Sample Preparation and LC-MS Techniques. Cells 2021; 10:689. [PMID: 33804650 PMCID: PMC8003640 DOI: 10.3390/cells10030689] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/15/2021] [Accepted: 03/16/2021] [Indexed: 02/06/2023] Open
Abstract
Nucleotides fulfill many essential functions in plants. Compared to non-plant systems, these hydrophilic metabolites have not been adequately investigated in plants, especially the less abundant nucleotide species such as deoxyribonucleotides and modified or damaged nucleotides. Until recently, this was mainly due to a lack of adequate methods for in-depth analysis of nucleotides and nucleosides in plants. In this review, we focus on the current state-of-the-art of nucleotide analysis in plants with liquid chromatography coupled to mass spectrometry and describe recent major advances. Tissue disruption, quenching, liquid-liquid and solid-phase extraction, chromatographic strategies, and peculiarities of nucleotides and nucleosides in mass spectrometry are covered. We describe how the different steps of the analytical workflow influence each other, highlight the specific challenges of nucleotide analysis, and outline promising future developments. The metabolite matrix of plants is particularly complex. Therefore, it is likely that nucleotide analysis methods that work for plants can be applied to other organisms as well. Although this review focuses on plants, we also discuss advances in nucleotide analysis from non-plant systems to provide an overview of the analytical techniques available for this challenging class of metabolites.
Collapse
Affiliation(s)
| | - Claus-Peter Witte
- Department of Molecular Nutrition and Biochemistry of Plants, Leibniz Universität Hannover, 30419 Hannover, Germany;
| | - Marco Herde
- Department of Molecular Nutrition and Biochemistry of Plants, Leibniz Universität Hannover, 30419 Hannover, Germany;
| |
Collapse
|
5
|
Zitka O, Kudr J, Labuda J, Xhaxhiu K, Adam V. Separation of Nucleobases Using High-performance Liquid Chromatography Coupled with Voltammetric Scanning. ELECTROANAL 2018. [DOI: 10.1002/elan.201800175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ondrej Zitka
- Department of Chemistry and Biochemistry; Mendel University in Brno; Zemedelska 1 CZ-613 00 Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Purkyňova 656/123 612 00 BRNO Czech Republic
| | - Jiri Kudr
- Department of Chemistry and Biochemistry; Mendel University in Brno; Zemedelska 1 CZ-613 00 Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Purkyňova 656/123 612 00 BRNO Czech Republic
- Faculty of Electrical Engineering and Communication; Brno University of Technology; Technicka 3058/10, 616 Brno Czech Republic
| | - Jan Labuda
- Institute of Analytical Chemistry; Slovak University of Technology in Bratislava; Radlinskeho 9 SK-812 37 Bratislava Slovakia
| | - Kledi Xhaxhiu
- Department of Chemistry; Faculty of Natural Sciences; University of Tirana, Blv. Zog I, No. 2/1, 1001; Tirana Albania
| | - Vojtech Adam
- Department of Chemistry and Biochemistry; Mendel University in Brno; Zemedelska 1 CZ-613 00 Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Purkyňova 656/123 612 00 BRNO Czech Republic
| |
Collapse
|
6
|
Jandera P, Hájek T. Mobile phase effects on the retention on polar columns with special attention to the dual hydrophilic interaction-reversed-phase liquid chromatography mechanism, a review. J Sep Sci 2017; 41:145-162. [DOI: 10.1002/jssc.201701010] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/04/2017] [Accepted: 10/04/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Pavel Jandera
- Department of Analytical Chemistry; Faculty of Chemical Technology; University of Pardubice; Pardubice Czech Republic
| | - Tomáš Hájek
- Department of Analytical Chemistry; Faculty of Chemical Technology; University of Pardubice; Pardubice Czech Republic
| |
Collapse
|
7
|
Jandera P, Janás P. Recent advances in stationary phases and understanding of retention in hydrophilic interaction chromatography. A review. Anal Chim Acta 2017; 967:12-32. [DOI: 10.1016/j.aca.2017.01.060] [Citation(s) in RCA: 180] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 01/05/2017] [Accepted: 01/06/2017] [Indexed: 12/01/2022]
|
8
|
Pesek JJ, Matyksa MT, Modereger B, Hasbun A, Phan VT, Mehr Z, Guzman M, Watanable S. The separation and analysis of symmetric and asymmetric dimethylarginine and other hydrophilic isobaric compounds using aqueous normal phase chromatography. J Chromatogr A 2016; 1441:52-9. [DOI: 10.1016/j.chroma.2016.02.071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 02/19/2016] [Accepted: 02/22/2016] [Indexed: 10/22/2022]
|
9
|
Pesek JJ, Matyska MT. Ammonium fluoride as a mobile phase additive in aqueous normal phase chromatography. J Chromatogr A 2015; 1401:69-74. [PMID: 26008598 DOI: 10.1016/j.chroma.2015.05.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 04/22/2015] [Accepted: 05/06/2015] [Indexed: 11/17/2022]
Abstract
The use of ammonium fluoride as a mobile phase additive in aqueous normal phase chromatography with silica hydride-based stationary phases and mass spectrometry detection is evaluated. Retention times, peak shape, efficiency and peak intensity are compared to the more standard additives formic acid and ammonium formate. The test solutes were NAD, 3-hydroxyglutaric acid, α-ketoglutaric acid, p-aminohippuric acid, AMP, ATP, aconitic acid, threonine, N-acetyl carnitine, and 3-methyladipic acid. The column parameters are assessed in both the positive and negative ion detection modes. Ammonium fluoride is potentially an aggressive mobile phase additive that could have detrimental effects on column lifetime. Column reproducibility is measured and the effects of switching between different additives are also tested.
Collapse
Affiliation(s)
- Joseph J Pesek
- Department of Chemistry, San Jose State University, San Jose, CA 95192, USA.
| | - Maria T Matyska
- Department of Chemistry, San Jose State University, San Jose, CA 95192, USA
| |
Collapse
|
10
|
Yin P, Xu G. Current state-of-the-art of nontargeted metabolomics based on liquid chromatography-mass spectrometry with special emphasis in clinical applications. J Chromatogr A 2014; 1374:1-13. [PMID: 25444251 DOI: 10.1016/j.chroma.2014.11.050] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 11/16/2014] [Accepted: 11/17/2014] [Indexed: 12/21/2022]
Abstract
Metabolomics, as a part of systems biology, has been widely applied in different fields of life science by studying the endogenous metabolites. The development and applications of liquid chromatography (LC) coupled with high resolution mass spectrometry (MS) greatly improve the achievable data quality in non-targeted metabolic profiling. However, there are still some emerging challenges to be covered in LC-MS based metabolomics. Here, recent approaches about sample collection and preparation, instrumental analysis, and data handling of LC-MS based metabolomics are summarized, especially in the analysis of clinical samples. Emphasis is put on the improvement of analytical techniques including the combination of different LC columns, isotope coded derivatization methods, pseudo-targeted LC-MS method, new data analysis algorithms and structural identification of important metabolites.
Collapse
Affiliation(s)
- Peiyuan Yin
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Guowang Xu
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| |
Collapse
|
11
|
Liu Z, Rochfort S. Recent progress in polar metabolite quantification in plants using liquid chromatography–mass spectrometry. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2014; 56:816-825. [PMID: 25340205 DOI: 10.1111/jipb.12181] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Metabolite analysis or metabolomics is an important component of systems biology in the post-genomic era. Although separate liquid chromatography (LC) methods for quantification of the major classes of polar metabolites of plants have been available for decades, a single method that enables simultaneous determination of hundreds of polar metabolites is possible only with gas chromatography–mass spectrometry (GC–MS) techniques. The rapid expansion of new LC stationary phases in the market and the ready access of mass spectrometry in many laboratories provides an excellent opportunity for developing LC–MS based methods for multi-target quantification of polar metabolites. Although various LC–MS methods have been developed over the last 10 years with the aim to quantify one or more classes of polar compounds in different matrices, currently there is no consensus LC–MS method that is widely used in plant metabolomics studies. The most promising methods applicable to plant metabolite analysis will be reviewed in this paper and the major problems encountered highlighted. The aim of this review is to provide plant scientists, with limited to moderate experience in analytical chemistry, with up-to-date and simplified information regarding the current status of polar metabolite analysis using LC–MS techniques.
Collapse
|
12
|
Analysis of thiopurines using aqueous normal phase chromatography. J Pharm Biomed Anal 2014; 95:102-6. [PMID: 24657678 DOI: 10.1016/j.jpba.2014.02.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 02/22/2014] [Accepted: 02/25/2014] [Indexed: 11/22/2022]
Abstract
The chromatography of several thiopurines is investigated using aqueous normal phase (ANP) conditions in conjunction with a silica hydride-based column. Both isocratic and gradient elution modes are tested. Detection of higher concentration samples is done by UV to demonstrate feasibility in this format while lower concentration samples utilize mass spectrometry (MS). Repeatability of successive runs is also tested with particular attention to gradient methods where the equilibration time of the stationary phase can be evaluated.
Collapse
|
13
|
Current practice of liquid chromatography–mass spectrometry in metabolomics and metabonomics. J Pharm Biomed Anal 2014; 87:12-25. [DOI: 10.1016/j.jpba.2013.06.032] [Citation(s) in RCA: 280] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 06/26/2013] [Accepted: 06/29/2013] [Indexed: 02/06/2023]
|
14
|
Musilová J, Klejdus B, Glatz Z. Simultaneous quantification of energetically important metabolites in various cell types by CZE. J Sep Sci 2013; 36:3807-12. [PMID: 24123860 DOI: 10.1002/jssc.201300926] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 09/19/2013] [Accepted: 09/25/2013] [Indexed: 12/31/2022]
Abstract
A new CZE method was developed for the determination of 12 purine and pyrimidine nucleotides, two adenine coenzymes and their reduced forms, and acetyl coenzyme A in various cell extracts. As the concentration levels of these metabolites in living cells are low; CZE was combined with field-enhanced sample stacking. As a result, the separation conditions were optimised to achieve a suitable resolution at the relatively high sample volume provided by this on-line pre-concentration technique. The optimum BGE was 150 mM glycine buffer (pH 9.5). Samples were introduced hydrodynamically using a pressure of 35 mbar (3.5 kPa) for 25 s, and data were collected at a detection wavelength of 260 nm. An applied voltage of 30 kV (positive polarity) and capillary temperature of 25°C gave the best separation of these compounds. The optimised method was validated by determining the linearity, sensitivity and repeatability and it was successfully applied for the analysis of extracts from Paracoccus denitrificans bacteria and from stem cells.
Collapse
Affiliation(s)
- Jindra Musilová
- Department of Biochemistry, Faculty of Science and CEITEC-Central European Institute of Technology, Masaryk University, Czech Republic
| | | | | |
Collapse
|
15
|
Theodoridis GA, Michopoulos F, Gika HG, Plumb RS, Wilson ID. Liquid Chromatographic Techniques in Metabolomics. CHROMATOGRAPHIC METHODS IN METABOLOMICS 2013. [DOI: 10.1039/9781849737272-00064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In the past decade, LC‐MS‐based metabolomic/metabonomic profiling has become a major analytical focus for biomarker research. Chromatographic resolution is continually improving with the development of more advanced separation platforms based on smaller particle sizes, new types of stationary phase and miniaturized systems allowing the profiling of biological samples for metabolites in ways that were simply not possible before. Chromatographic advances, combined with increased mass resolution instruments that provide sub‐2 ppm mass accuracy and high sensitivity, have greatly facilitated the detection and identification of potential biomarkers. In this chapter, the most common LC(‐MS) methods utilized in metabolic analyses are presented, with emphasis on novel high‐efficiency and high‐throughput analyses and their suitability for metabolic analyses. Guidelines for the selection of the appropriate method for different applications are given, with emphasis on the use of LC‐MS.
Collapse
Affiliation(s)
| | - Filippos Michopoulos
- Department of Chemistry Aristotle University Thessaloniki, 541 24 Thessaloniki Greece
- Oncology IM, AstraZeneca Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG UK
| | - Helen G. Gika
- Department of Chemical Engineering Aristotle University Thessaloniki, 541 24 Thessaloniki Greece
| | - Robert S. Plumb
- Department of Surgery and Oncology Sir Alexander Fleming Building, Imperial College, Exhibition Road, South Kensington, London SW7 2AZ UK
| | - Ian D. Wilson
- Department of Surgery and Oncology Sir Alexander Fleming Building, Imperial College, Exhibition Road, South Kensington, London SW7 2AZ UK
| |
Collapse
|
16
|
Posakony JJ, Ferré-D'Amaré AR. Glucosamine and glucosamine-6-phosphate derivatives: catalytic cofactor analogues for the glmS ribozyme. J Org Chem 2013; 78:4730-43. [PMID: 23578404 DOI: 10.1021/jo400192e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Two analogues of glucosamine-6-phosphate (GlcN6P, 1) and five of glucosamine (GlcN, 2) were prepared for evaluation as catalytic cofactors of the glmS ribozyme, a bacterial gene-regulatory RNA that controls cell wall biosynthesis. Glucosamine and allosamine with 3-azido substitutions were prepared by SN2 reactions of the respective 1,2,4,6-protected sugars; final acidic hydrolysis afforded the fully deprotected compounds as their TFA salts. A 6-phospho-2-aminoglucolactam (31) was prepared from glucosamine in a 13-step synthesis, which included a late-stage POCl3-phosphorylation. A simple and widely applicable 2-step procedure with the triethylsilyl (TES) protecting group was developed to selectively expose the 6-OH group in N-protected glucosamine analogues, which provided another route to chemical phosphorylation. Mitsunobu chemistry afforded 6-cyano (35) and 6-azido (36) analogues of GlcN-(Cbz), and the selectivity for the 6-position was confirmed by NMR (COSY, HMBC, HMQC) experiments. Compound 36 was converted to the fully deprotected 6-azido-GlcN (37) and 2,6-diaminoglucose (38) analogues. A 2-hydroxylamino glucose (42) analogue was prepared via an oxaziridine (41). Enzymatic phosphorylation of 42 and chemical phosphorylation of its 6-OH precursor (43) were possible, but 42 and the 6-phospho product (44) were unstable under neutral or basic conditions. Chemical phosphorylation of the previously described 2-guanidinyl-glucose (46) afforded its 6-phospho analogue (49) after final deprotection.
Collapse
Affiliation(s)
- Jeffrey J Posakony
- National Heart, Lung, and Blood Institute, 50 South Drive, MSC 8012, Bethesda, Maryland 20892-8012, USA.
| | | |
Collapse
|
17
|
Pesek JJ, Matyska MT, Boysen RI, Yang Y, Hearn MT. Aqueous normal-phase chromatography using silica-hydride-based stationary phases. Trends Analyt Chem 2013. [DOI: 10.1016/j.trac.2012.09.016] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
18
|
Monitoring of thiopurine metabolites - a high-performance liquid chromatography method for clinical use. J Pharm Biomed Anal 2012; 75:145-52. [PMID: 23261807 DOI: 10.1016/j.jpba.2012.11.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 11/16/2012] [Accepted: 11/17/2012] [Indexed: 12/24/2022]
Abstract
A high-performance liquid chromatography method capable of measuring thiopurine mono-, di-, and triphosphates separately in red blood cells (RBCs) was developed. RBCs were isolated from whole blood using centrifugation. Proteins were precipitated using dichloromethane and methanol. The thioguanine nucleotides (TGNs) were derivatised using potassium permanganate before analysis. Analytes were separated by ion-pairing liquid chromatography using tetrabutylammonium ions and detected using UV absorption and fluorescence. The method was designed for use in clinical trials. Ten patient samples were analysed to demonstrate clinical application and to establish pilot ranges for all analytes. The method measured thioguanosine mono-(TGMP), di-(TGDP), and triphosphate (TGTP), as well as methylthioinosine mono- (meTIMP), di- (meTIDP) and triphosphate (meTITP) in RBCs collected from patients treated with thiopurine drugs (azathioprine, 6-mercaptopurine, and 6-thioguanine). LOQ was 0.3, 3, 2, 30, 30 and 40 pmol/8 × 10⁸ RBC, for TGMP, TGDP, TGTP, meTIMP, meTIDP and meTITP, respectively. Between-day precision were below 14% for all analytes at all concentrations and samples were stable at 4 °C for 8 h after sampling.
Collapse
|
19
|
Soukup J, Jandera P. The effect of temperature and mobile phase composition on separation mechanism of flavonoid compounds on hydrosilated silica-based columns. J Chromatogr A 2012; 1245:98-108. [DOI: 10.1016/j.chroma.2012.05.024] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 05/02/2012] [Accepted: 05/07/2012] [Indexed: 12/01/2022]
|
20
|
Pesek JJ, Matyska MT, Dang A. Analysis of cycloserine and related compounds using aqueous normal phase chromatography/mass spectrometry. J Pharm Biomed Anal 2012; 64-65:72-6. [DOI: 10.1016/j.jpba.2012.02.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Revised: 02/16/2012] [Accepted: 02/17/2012] [Indexed: 10/28/2022]
|
21
|
Soukup J, Jandera P. Hydrosilated silica-based columns: The effects of mobile phase and temperature on dual hydrophilic-reversed-phase separation mechanism of phenolic acids. J Chromatogr A 2012; 1228:125-34. [DOI: 10.1016/j.chroma.2011.06.077] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Revised: 06/13/2011] [Accepted: 06/23/2011] [Indexed: 10/18/2022]
|
22
|
Theodoridis GA, Gika HG, Want EJ, Wilson ID. Liquid chromatography-mass spectrometry based global metabolite profiling: a review. Anal Chim Acta 2011; 711:7-16. [PMID: 22152789 DOI: 10.1016/j.aca.2011.09.042] [Citation(s) in RCA: 328] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 09/18/2011] [Accepted: 09/29/2011] [Indexed: 12/12/2022]
Abstract
Untargeted, global metabolite profiling (often described as metabonomics or metabolomics) represents an expanding research topic and is, potentially, a major pillar for systems biology studies. To obtain holistic metabolic profiles from complex samples, such as biological fluids or tissue extracts, requires powerful, high resolution and information-rich analytical methods and for this spectroscopic technologies are generally used. Mass spectrometry, coupled to liquid chromatography (LC-MS), is increasingly being used for such investigations as a result of the significant advances in both technologies over the past decade. Here we try to critically review the topic of LC-MS-based global metabolic profiling and describe and compare the results offered by different analytical strategies and technologies. This review highlights the current challenges, limitations and opportunities of the current methodology.
Collapse
|
23
|
Boysen RI, Yang Y, Chowdhury J, Matyska MT, Pesek JJ, Hearn MT. Simultaneous separation of hydrophobic and hydrophilic peptides with a silica hydride stationary phase using aqueous normal phase conditions. J Chromatogr A 2011; 1218:8021-6. [DOI: 10.1016/j.chroma.2011.09.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 09/01/2011] [Accepted: 09/05/2011] [Indexed: 12/01/2022]
|
24
|
Separation strategies for untargeted metabolomics. J Sep Sci 2011; 34:3460-9. [DOI: 10.1002/jssc.201100532] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2011] [Revised: 07/27/2011] [Accepted: 07/27/2011] [Indexed: 11/07/2022]
|
25
|
Stationary and mobile phases in hydrophilic interaction chromatography: a review. Anal Chim Acta 2011; 692:1-25. [PMID: 21501708 DOI: 10.1016/j.aca.2011.02.047] [Citation(s) in RCA: 483] [Impact Index Per Article: 37.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 02/14/2011] [Accepted: 02/18/2011] [Indexed: 11/22/2022]
Abstract
Hydrophilic interaction chromatography (HILIC) is valuable alternative to reversed-phase liquid chromatography separations of polar, weakly acidic or basic samples. In principle, this separation mode can be characterized as normal-phase chromatography on polar columns in aqueous-organic mobile phases rich in organic solvents (usually acetonitrile). Highly organic HILIC mobile phases usually enhance ionization in the electrospray ion source of a mass spectrometer, in comparison to mobile phases with higher concentrations of water generally used in reversed-phase (RP) LC separations of polar or ionic compounds, which is another reason for increasing popularity of this technique. Various columns can be used in the HILIC mode for separations of peptides, proteins, oligosaccharides, drugs, metabolites and various natural compounds: bare silica gel, silica-based amino-, amido-, cyano-, carbamate-, diol-, polyol-, zwitterionic sulfobetaine, or poly(2-sulphoethyl aspartamide) and other polar stationary phases chemically bonded on silica gel support, but also ion exchangers or zwitterionic materials showing combined HILIC-ion interaction retention mechanism. Some stationary phases are designed to enhance the mixed-mode retention character. Many polar columns show some contributions of reversed phase (hydrophobic) separation mechanism, depending on the composition of the mobile phase, which can be tuned to suit specific separation problems. Because the separation selectivity in the HILIC mode is complementary to that in reversed-phase and other modes, combinations of the HILIC, RP and other systems are attractive for two-dimensional applications. This review deals with recent advances in the development of HILIC phase separation systems with special attention to the properties of stationary phases. The effects of the mobile phase, of sample structure and of temperature on separation are addressed, too.
Collapse
|
26
|
Multi-modal applicability of a reversed-phase/weak-anion exchange material in reversed-phase, anion-exchange, ion-exclusion, hydrophilic interaction and hydrophobic interaction chromatography modes. Anal Bioanal Chem 2011; 400:2517-30. [PMID: 21336792 DOI: 10.1007/s00216-011-4755-3] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Revised: 01/28/2011] [Accepted: 02/01/2011] [Indexed: 10/18/2022]
Abstract
We recently introduced a mixed-mode reversed-phase/weak anion-exchange type separation material based on silica particles which consisted of a hydrophobic alkyl strand with polar embedded groups (thioether and amide functionalities) and a terminal weak anion-exchange-type quinuclidine moiety. This stationary phase was designed to separate molecules by lipophilicity and charge differences and was mainly devised for peptide separations with hydroorganic reversed-phase type elution conditions. Herein, we demonstrate the extraordinary flexibility of this RP/WAX phase, in particular for peptide separations, by illustrating its applicability in various chromatographic modes. The column packed with this material can, depending on the solute character and employed elution conditions, exploit attractive or repulsive electrostatic interactions, and/or hydrophobic or hydrophilic interactions as retention and selectivity increments. As a consequence, the column can be operated in a reversed-phase mode (neutral compounds), anion-exchange mode (acidic compounds), ion-exclusion chromatography mode (cationic solutes), hydrophilic interaction chromatography mode (polar compounds), and hydrophobic interaction chromatography mode (e.g., hydrophobic peptides). Mixed-modes of these chromatographic retention principles may be materialized as well. This allows an exceptionally flexible adjustment of retention and selectivity by tuning experimental conditions. The distinct separation mechanisms will be outlined by selected examples of peptide separations in the different modes.
Collapse
|
27
|
Hellmuth C, Koletzko B, Peissner W. Aqueous normal phase chromatography improves quantification and qualification of homocysteine, cysteine and methionine by liquid chromatography–tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:83-9. [DOI: 10.1016/j.jchromb.2010.11.016] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Revised: 11/10/2010] [Accepted: 11/15/2010] [Indexed: 10/18/2022]
|