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Kloudová B, Vrkoslav V, Polášek M, Bosáková Z, Cvačka J. Structural characterization of wax esters using ultraviolet photodissociation mass spectrometry. Anal Bioanal Chem 2024; 416:5497-5512. [PMID: 39030399 PMCID: PMC11427557 DOI: 10.1007/s00216-024-05434-2] [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: 04/02/2024] [Revised: 07/01/2024] [Accepted: 07/03/2024] [Indexed: 07/21/2024]
Abstract
Wax esters play critical roles in biological systems, serving functions from energy storage to chemical signaling. Their diversity is attributed to variations in alcohol and acyl chains, including their length, branching, and the stereochemistry of double bonds. Traditional analysis by mass spectrometry with collisional activations (CID, HCD) offers insights into acyl chain lengths and unsaturation level. Still, it falls short in pinpointing more nuanced structural features like the position of double bonds. As a solution, this study explores the application of 213-nm ultraviolet photodissociation (UVPD) for the detailed structural analysis of wax esters. It is shown that lithium adducts provide unique fragments as a result of Norrish and Norrish-Yang reactions at the ester moieties and photoinduced cleavages of double bonds. The product ions are useful for determining chain lengths and localizing double bonds. UVPD spectra of various wax esters are presented systematically, and the effect of activation time is discussed. The applicability of tandem mass spectrometry with UVPD is demonstrated for wax esters from natural sources. The UHPLC analysis of jojoba oil proves the compatibility of MS2 UVPD with the chromatography time scale, and a direct infusion is used to analyze wax esters from vernix caseosa. Data shows the potential of UVPD and its combination with CID or HCD in advancing our understanding of wax ester structures.
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Affiliation(s)
- Barbora Kloudová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 542/2, 160 00, Prague 6, Czech Republic
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, CZ-128 43, Prague 2, Czech Republic
| | - Vladimír Vrkoslav
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 542/2, 160 00, Prague 6, Czech Republic
| | - Miroslav Polášek
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23, Prague 8, Czech Republic
| | - Zuzana Bosáková
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, CZ-128 43, Prague 2, Czech Republic
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 542/2, 160 00, Prague 6, Czech Republic.
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, CZ-128 43, Prague 2, Czech Republic.
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Review of Recent Advances in Lipid Analysis of Biological Samples via Ambient Ionization Mass Spectrometry. Metabolites 2021; 11:metabo11110781. [PMID: 34822439 PMCID: PMC8623600 DOI: 10.3390/metabo11110781] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 12/27/2022] Open
Abstract
The rapid and direct structural characterization of lipids proves to be critical for studying the functional roles of lipids in many biological processes. Among numerous analytical techniques, ambient ionization mass spectrometry (AIMS) allows for a direct molecular characterization of lipids from various complex biological samples with no/minimal sample pretreatment. Over the recent years, researchers have expanded the applications of the AIMS techniques to lipid structural elucidation via a combination with a series of derivatization strategies (e.g., the Paternò–Büchi (PB) reaction, ozone-induced dissociation (OzID), and epoxidation reaction), including carbon–carbon double bond (C=C) locations and sn-positions isomers. Herein, this review summarizes the reaction mechanisms of various derivatization strategies for C=C bond analysis, typical instrumental setup, and applications of AIMS in the structural elucidation of lipids from various biological samples (e.g., tissues, cells, and biofluids). In addition, future directions of AIMS for lipid structural elucidation are discussed.
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Horká P, Vrkoslav V, Kindl J, Schwarzová-Pecková K, Cvačka J. Structural Characterization of Unusual Fatty Acid Methyl Esters with Double and Triple Bonds Using HPLC/APCI-MS 2 with Acetonitrile In-Source Derivatization. Molecules 2021; 26:molecules26216468. [PMID: 34770878 PMCID: PMC8588306 DOI: 10.3390/molecules26216468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/21/2021] [Accepted: 10/21/2021] [Indexed: 12/11/2022] Open
Abstract
Double and triple bonds have significant effects on the biological activities of lipids. Determining multiple bond positions in their molecules by mass spectrometry usually requires chemical derivatization. This work presents an HPLC/MS method for pinpointing the double and triple bonds in fatty acids. Fatty acid methyl esters were separated by reversed-phase HPLC with an acetonitrile mobile phase. In the APCI source, acetonitrile formed reactive species, which added to double and triple bonds to form [M + C3H5N]+• ions. Their collisional activation in an ion trap provided fragments helpful in localizing the multiple bond positions. This approach was applied to fatty acids with isolated, cumulated, and conjugated double bonds and triple bonds. The fatty acids were isolated from the fat body of early-nesting bumblebee Bombus pratorum and seeds or seed oils of Punicum granatum, Marrubium vulgare, and Santalum album. Using the method, the presence of the known fatty acids was confirmed, and new ones were discovered.
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Affiliation(s)
- Petra Horká
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo Náměstí 542/2, 166 00 Prague 6, Czech Republic; (P.H.); (V.V.); (J.K.)
- Department of Analytical Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43 Prague 2, Czech Republic;
| | - Vladimír Vrkoslav
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo Náměstí 542/2, 166 00 Prague 6, Czech Republic; (P.H.); (V.V.); (J.K.)
| | - Jiří Kindl
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo Náměstí 542/2, 166 00 Prague 6, Czech Republic; (P.H.); (V.V.); (J.K.)
| | - Karolina Schwarzová-Pecková
- Department of Analytical Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43 Prague 2, Czech Republic;
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo Náměstí 542/2, 166 00 Prague 6, Czech Republic; (P.H.); (V.V.); (J.K.)
- Department of Analytical Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43 Prague 2, Czech Republic;
- Correspondence: ; Tel.: +420-220-183-303
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4
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Strmeň T, Vrkoslav V, Bosáková Z, Cvačka J. Atmospheric pressure chemical ionization mass spectrometry at low flow rates: Importance of ion source housing. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34:e8722. [PMID: 31912928 DOI: 10.1002/rcm.8722] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 12/01/2019] [Accepted: 01/06/2020] [Indexed: 06/10/2023]
Abstract
RATIONALE Hyphenation of atmospheric pressure chemical ionization (APCI) mass spectrometry with capillary and micro high-performance liquid chromatography (HPLC) is attractive for many applications, but reliable ion sources dedicated to these conditions are still missing. There are a number of aspects to consider when designing such an ion source, including the susceptibility of the ionization processes to ambient conditions. Here we discuss the importance of ion source housing for APCI at low flow rates. METHODS Selected compounds dissolved in various solvents were used to study ionization reactions at 10 μL/min flow rate. APCI spectra were generated using the Ion Max-S source (Thermo Fisher Scientific) operated with or without the ion source housing. RESULTS The APCI spectra of most compounds measured in the open and enclosed ion sources were markedly different. The differences were explained by water and oxygen molecules that entered the plasma region of the open ion source. Water tended to suppress charge transfer processes while oxygen diminished electron capture reactions and prevented the formation of acetonitrile-related radical cations useful for localizing double bonds in lipids. The effects associated with the ion source housing were significantly less important for compounds that are easy to protonate or deprotonate. CONCLUSIONS The use of ion source housing prevented alternative ionization channels leading to unwanted or unexpected ions. Compared with the conventional flow rate mode (1 mL/min), the effects of ambient air components were significantly higher at 10 μL/min, emphasizing the need for ion source housing in APCI sources dedicated to low flow rates.
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Affiliation(s)
- Timotej Strmeň
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, CZ-166 10, Prague 6, Czech Republic
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, CZ-128 43, Prague 2, Czech Republic
| | - Vladimír Vrkoslav
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, CZ-166 10, Prague 6, Czech Republic
| | - Zuzana Bosáková
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, CZ-128 43, Prague 2, Czech Republic
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, CZ-166 10, Prague 6, Czech Republic
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, CZ-128 43, Prague 2, Czech Republic
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Vrkoslav V, Rumlová B, Strmeň T, Cvačka J. Temperature-programmed capillary high-performance liquid chromatography with atmospheric pressure chemical ionization mass spectrometry for analysis of fatty acid methyl esters. J Sep Sci 2020; 43:2579-2588. [PMID: 32277790 DOI: 10.1002/jssc.201901235] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 04/07/2020] [Accepted: 04/07/2020] [Indexed: 11/10/2022]
Abstract
A new capillary high-performance liquid chromatography method with atmospheric pressure chemical ionization mass spectrometry was developed for the analysis of fatty acid methyl esters and long-chain alcohols. The chromatographic separation was achieved using a Zorbax SB-C18 HPLC column (0.3 × 150 mm, 3.5 μm) with a mobile phase composed of acetonitrile and formic acid and delivered isocratically at a flow rate of 10 μL/min. The column temperature was programmed simply, using a common column oven. Good reproducibility of the temperature profile and retention times were achieved. The temperature programming during the isocratic high-performance liquid chromatography run had a similar effect as a solvent gradient; it reduced retention times of later eluting analytes and improved their detection limits. Two atmospheric pressure chemical ionization sources of the mass spectrometry detector were compared: an enclosed conventional ion source and an in-house made ion source with a glass microchip nebulizer. The enclosed source provided better detectability of saturated fatty acid methyl esters and made it possible to determine the double bond positions using acetonitrile-related adducts, while the open chip-based source provided better analytical figures of merit for unsaturated fatty acid methyl esters. Temperature-programmed capillary high-performance liquid chromatography is a promising method for analyzing neutral lipids in lipidomics and other applications.
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Affiliation(s)
- Vladimír Vrkoslav
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague 6, Czech Republic
| | - Barbora Rumlová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague 6, Czech Republic.,Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Prague 2, Czech Republic
| | - Timotej Strmeň
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague 6, Czech Republic.,Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Prague 2, Czech Republic
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague 6, Czech Republic.,Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Prague 2, Czech Republic
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Poad BLJ, Marshall DL, Harazim E, Gupta R, Narreddula VR, Young RSE, Duchoslav E, Campbell JL, Broadbent JA, Cvačka J, Mitchell TW, Blanksby SJ. Combining Charge-Switch Derivatization with Ozone-Induced Dissociation for Fatty Acid Analysis. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:2135-2143. [PMID: 31347025 DOI: 10.1007/s13361-019-02285-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 07/07/2019] [Accepted: 07/08/2019] [Indexed: 06/10/2023]
Abstract
The specific positions of carbon-carbon double bond(s) within an unsaturated fatty acid exert a significant effect on the physical and chemical properties of the lipid that ultimately inform its biological function(s). Contemporary liquid chromatography-mass spectrometry (MS) strategies based on electrospray ionization coupled to tandem MS can easily detect fatty acyl lipids but generally cannot reveal those specific site(s) of unsaturation. Herein, we describe a novel and versatile workflow whereby fatty acids are first converted to fixed charge N-(4-aminomethylphenyl)pyridinium (AMPP) derivatives and subsequently subjected to ozone-induced dissociation (OzID) on a modified triple quadrupole mass spectrometer. The AMPP modification enhances the detection of fatty acids introduced by direct infusion. Fragmentation of the derivatized fatty acids also provides diagnostic fragment ions upon collision-induced dissociation that can be targeted in precursor ion scans to subsequently trigger OzID analyses in an automated data-dependent workflow. It is these OzID analyses that provide unambiguous assignment of carbon-carbon double bond locations in the AMPP-derivatized fatty acids. The performance of this analysis pipeline is assessed in profiling the patterns of unsaturation in fatty acids within the complex biological secretion vernix caseosa. This analysis uncovers significant isomeric diversity within the fatty acid pool of this sample, including a number of hitherto unreported double bond positional isomers that hint at the activity of potentially new metabolic pathways.
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Affiliation(s)
- Berwyck L J Poad
- Central Analytical Research Facility, Queensland University of Technology, Brisbane, Australia.
| | - David L Marshall
- Central Analytical Research Facility, Queensland University of Technology, Brisbane, Australia
| | - Eva Harazim
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Rajesh Gupta
- Central Analytical Research Facility, Queensland University of Technology, Brisbane, Australia
| | - Venkateswara R Narreddula
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Australia
| | - Reuben S E Young
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Australia
| | | | | | - James A Broadbent
- SCIEX, Concord, ON, Canada
- CSIRO Agriculture and Food, St Lucia, Queensland, 4067, Australia
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Todd W Mitchell
- School of Medicine and Molecular Horizons, University of Wollongong, Wollongong, Australia
| | - Stephen J Blanksby
- Central Analytical Research Facility, Queensland University of Technology, Brisbane, Australia.
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Frick AA, Weyermann C. An untargeted lipidomic approach for qualitative determination of latent fingermark glycerides using UPLC-IMS-QToF-MS E. Analyst 2019; 144:3590-3600. [PMID: 31065642 DOI: 10.1039/c9an00521h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
More detailed fundamental information is required about latent fingermark composition in order to better understand fingermark properties and their impact on detection efficiency, and the physical and chemical changes that occur with time following deposition. The composition of the glyceride fraction of latent fingermark lipids in particular is relatively under-investigated due in part to their high structural variability and the limitations of the analytical methods most frequently utilised to investigate fingermark composition. Here, we present an ultra performance liquid chromatography-ion mobility spectroscopy-quadrupole time-of-flight mass spectrometry (UPLC-IMS-QToF-MSE) method to characterise glycerides in charged latent fingermarks using data-independent acquisition. Di- and triglycerides were identified in fingermark samples from a population of 10 donors, through a combination of in silico fragmentation and monitoring for fatty acid neutral losses. 23 diglycerides and 85 families of triglycerides were identified, with significant diversity in chain length and unsaturation. 21 of the most abundant triglyceride families were found to be common to most or all donors, presenting potential targets for further studies to monitor chemical and physical changes in latent fingermarks over time. Differences in relative peak intensities may be indicative of inter- and intra-donor variability. While this study represents a promising step to obtaining more in-depth information about fingermark composition, it also highlights the complex nature of these traces.
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Affiliation(s)
- Amanda A Frick
- École des Sciences Criminelles, Université de Lausanne, Batochime, 1015 Lausanne, Switzerland.
| | - Céline Weyermann
- École des Sciences Criminelles, Université de Lausanne, Batochime, 1015 Lausanne, Switzerland.
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Harazim E, Vrkoslav V, Buděšínský M, Harazim P, Svoboda M, Plavka R, Bosáková Z, Cvačka J. Nonhydroxylated 1- O-acylceramides in vernix caseosa. J Lipid Res 2018; 59:2164-2173. [PMID: 30254076 PMCID: PMC6210899 DOI: 10.1194/jlr.m088864] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/21/2018] [Indexed: 01/22/2023] Open
Abstract
Vernix caseosa, the waxy substance that coats the skin of newborn babies, has an extremely complex lipid composition. We have explored these lipids and identified nonhydroxylated 1-O-acylceramides (1-O-ENSs) as a new class of lipids in vernix caseosa. These ceramides mostly contain saturated C11-C38 ester-linked (1-O) acyls, saturated C12-C39 amide-linked acyls, and C16-C24 sphingoid bases. Because their fatty acyl chains are frequently branched, numerous molecular species were separable and detectable by HPLC/MS: we found more than 2,300 molecular species, 972 of which were structurally characterized. The most abundant 1-O-ENSs contained straight-chain and branched fatty acyls with 20, 22, 24, or 26 carbons in the 1-O position, 24 or 26 carbons in the N position, and sphingosine. The 1-O-ENSs were isolated using multistep TLC and HPLC and they accounted for 1% of the total lipid extract. The molecular species of 1-O-ENSs were separated on a C18 HPLC column using an acetonitrile/propan-2-ol gradient and detected by APCI-MS, and the structures were elucidated by high-resolution and tandem MS. Medium-polarity 1-O-ENSs likely contribute to the cohesiveness and to the waterproofing and moisturizing properties of vernix caseosa.
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Affiliation(s)
- Eva Harazim
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Praha 6, Czech Republic
- Department of Analytical Chemistry, Faculty of Science, Charles University, CZ-128 43 Praha 2, Czech Republic
| | - Vladimír Vrkoslav
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Praha 6, Czech Republic
| | - Miloš Buděšínský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Praha 6, Czech Republic
| | - Petr Harazim
- Department of Concrete and Masonry Structures, Faculty of Civil Engineering, Czech Technical University in Prague, CZ-166 29 Praha 6, Czech Republic
| | - Martin Svoboda
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Praha 6, Czech Republic
| | - Richard Plavka
- Department of Obstetrics and Gynecology, First Faculty of Medicine, Charles University and General University Hospital in Prague, CZ-128 00 Praha 2, Czech Republic
| | - Zuzana Bosáková
- Department of Analytical Chemistry, Faculty of Science, Charles University, CZ-128 43 Praha 2, Czech Republic
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Praha 6, Czech Republic
- Department of Analytical Chemistry, Faculty of Science, Charles University, CZ-128 43 Praha 2, Czech Republic
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10
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Vrkoslav V, Rumlová B, Strmeň T, Nekvasilová P, Šulc M, Cvačka J. Applicability of low-flow atmospheric pressure chemical ionization and photoionization mass spectrometry with a microfabricated nebulizer for neutral lipids. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2018; 32:639-648. [PMID: 29457286 DOI: 10.1002/rcm.8086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/05/2018] [Accepted: 02/06/2018] [Indexed: 06/08/2023]
Abstract
RATIONALE Mass spectrometry with atmospheric pressure chemical ionization (APCI) or photoionization (APPI) is widely used for neutral lipids involved in many fundamental processes in living organisms. Commercial APCI and APPI sources operate at high flow rates compatible with conventional high-performance liquid chromatography (HPLC). However, lipid analysis is often limited by a small amount of sample, which requires low flow rate separations like capillary or micro-HPLC. Therefore, APCI and APPI suitable for microliter-per-minute flow rates need to be developed and applied for neutral lipids. METHODS A micro-APCI/APPI source with a heated chip nebulizer was assembled and mounted on a Thermo ion trap instrument. The ion source operated in APCI, APPI or dual mode was optimized for low microliter-per-minute sample flow rates. The source performance was investigated for squalene, wax esters, fatty acid methyl esters, triacylglycerols, and cholesterol. RESULTS The ion source behaved as a mass-flow-sensitive detector. Direct infusion of methyl oleate showed superior analytical figures of merit when compared with high-flow ion sources. A detection limit of 200 pmol/mL and a linear dynamic range spanning three orders of magnitude were measured for micro-APCI. The mass spectra of most lipids differed from high flow rate spectra. Unlike micro-APCI, micro-APPI spectra were complicated by odd-electron species. Dual APCI/APPI mode did not show any benefits for neutral lipids. Applications for lipid samples were demonstrated. CONCLUSIONS Micro-APCI-MS is a useful detection technique for neutral lipids at microliter-per-minute flow rates. It offers high sensitivity and high quality of spectra in direct infusion mode and promises successful utilization in capillary and micro-HPLC applications.
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Affiliation(s)
- Vladimír Vrkoslav
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, CZ-166 10, Prague 6, Czech Republic
| | - Barbora Rumlová
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, CZ-128 43, Prague 2, Czech Republic
| | - Timotej Strmeň
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, CZ-166 10, Prague 6, Czech Republic
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, CZ-128 43, Prague 2, Czech Republic
| | - Pavlína Nekvasilová
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, CZ-128 43, Prague 2, Czech Republic
| | - Miloslav Šulc
- Czech University of Life Sciences, Faculty of Agrobiology Natural and Food Resources, Department of Chemistry, Kamýcká 129, CZ-165 00, Prague 6, Czech Republic
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, CZ-166 10, Prague 6, Czech Republic
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, CZ-128 43, Prague 2, Czech Republic
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Strmeň T, Vrkoslav V, Pačes O, Cvačka J. Evaluation of an ion source with a tubular nebulizer for microflow atmospheric pressure chemical ionization. MONATSHEFTE FUR CHEMIE 2018. [DOI: 10.1007/s00706-018-2172-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Rustam YH, Reid GE. Analytical Challenges and Recent Advances in Mass Spectrometry Based Lipidomics. Anal Chem 2017; 90:374-397. [PMID: 29166560 DOI: 10.1021/acs.analchem.7b04836] [Citation(s) in RCA: 209] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Yepy H Rustam
- Department of Biochemistry and Molecular Biology, University of Melbourne , Parkville, Victoria 3010, Australia
| | - Gavin E Reid
- Department of Biochemistry and Molecular Biology, University of Melbourne , Parkville, Victoria 3010, Australia.,School of Chemistry, University of Melbourne , Parkville, Victoria 3010, Australia.,Bio21 Molecular Science and Biotechnology Institute, University of Melbourne , Parkville, Victoria 3010, Australia
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13
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Kalužíková A, Vrkoslav V, Harazim E, Hoskovec M, Plavka R, Buděšínský M, Bosáková Z, Cvačka J. Cholesteryl esters of ω-( O-acyl)-hydroxy fatty acids in vernix caseosa. J Lipid Res 2017; 58:1579-1590. [PMID: 28576934 DOI: 10.1194/jlr.m075333] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 05/22/2017] [Indexed: 11/20/2022] Open
Abstract
Cholesteryl esters of ω-(O-acyl)-hydroxy FAs (Chl-ωOAHFAs) were identified for the first time in vernix caseosa and characterized using chromatography and MS. Chl-ωOAHFAs were isolated using adsorption chromatography on silica gel and magnesium hydroxide. Their general structure was established using high-resolution and tandem MS of intact lipids, and products of their transesterification and derivatizations. Individual molecular species were characterized using nonaqueous reversed-phase HPLC coupled to atmospheric pressure chemical ionization. The analytes were detected as protonated molecules, and their structures were elucidated in the negative ion mode using controlled thermal decomposition and data-dependent fragmentation. About three hundred molecular species of Chl-ωOAHFAs were identified in this way. The most abundant Chl-ωOAHFAs contained 32:1 ω-hydroxy FA (ω-HFA) and 14:0, 15:0, 16:0, 16:1, and 18:1 FAs. The double bond in the 32:1 ω-HFA was in the n-7 and n-9 positions. Chl-ωOAHFAs are estimated to account for approximately 1-2% of vernix caseosa lipids.
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Affiliation(s)
- Aneta Kalužíková
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, CZ-128 43 Prague 2, Czech Republic; The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Prague 6, Czech Republic
| | - Vladimír Vrkoslav
- The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Prague 6, Czech Republic
| | - Eva Harazim
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, CZ-128 43 Prague 2, Czech Republic; The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Prague 6, Czech Republic
| | - Michal Hoskovec
- The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Prague 6, Czech Republic
| | - Richard Plavka
- Department of Obstetrics and Gynecology, General Faculty Hospital and First Faculty of Medicine, Charles University in Prague, CZ-128 00 Prague 2, Czech Republic
| | - Miloš Buděšínský
- The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Prague 6, Czech Republic
| | - Zuzana Bosáková
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, CZ-128 43 Prague 2, Czech Republic
| | - Josef Cvačka
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, CZ-128 43 Prague 2, Czech Republic; The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Prague 6, Czech Republic.
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Hancock SE, Poad BL, Batarseh A, Abbott SK, Mitchell TW. Advances and unresolved challenges in the structural characterization of isomeric lipids. Anal Biochem 2017; 524:45-55. [DOI: 10.1016/j.ab.2016.09.014] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 09/11/2016] [Accepted: 09/16/2016] [Indexed: 12/25/2022]
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Fomich MA, Bekish AV, Vidovic D, Lamberson CR, Lysenko IL, Lawrence P, Brenna JT, Sharko OL, Shmanai VV, Shchepinov MS. Full Library of (Bis-allyl)-deuterated Arachidonic Acids: Synthesis and Analytical Verification. ChemistrySelect 2016. [DOI: 10.1002/slct.201600955] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Maksim A. Fomich
- Institute of Physical Organic Chemistry; National Academy of Sciences of Belarus; Surganova str. 13 220072 Minsk Belarus
| | - Andrei V. Bekish
- Department of Chemistry; Belarusian State University; 220050 Minsk, Leningradskaya 14 Belarus
| | - Dragoslav Vidovic
- Department of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences, Nanyang Technological University; 21 Nanyang Link Singapore 637371
| | - Connor R. Lamberson
- Department of Chemistry and Vanderbilt Institute of Chemical Biology; Vanderbilt University; Nashville, TN 37235 USA
| | - Ivan L. Lysenko
- Institute of Physical Organic Chemistry; National Academy of Sciences of Belarus; Surganova str. 13 220072 Minsk Belarus
| | - Peter Lawrence
- Division of Nutritional Sciences; Cornell University, Savage Hall; Ithaca, NY 14853 USA
| | - J. Thomas Brenna
- Division of Nutritional Sciences; Cornell University, Savage Hall; Ithaca, NY 14853 USA
| | - Olga L. Sharko
- Institute of Physical Organic Chemistry; National Academy of Sciences of Belarus; Surganova str. 13 220072 Minsk Belarus
| | - Vadim V. Shmanai
- Institute of Physical Organic Chemistry; National Academy of Sciences of Belarus; Surganova str. 13 220072 Minsk Belarus
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