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Fonseca D, Martins N, Garcia R, Cabrita MJ. Comprehensive Two-Dimensional Gas Chromatography with a TOF MS Detector-An Effective Tool to Trace the Signature of Grape Varieties. Molecules 2024; 29:1989. [PMID: 38731480 PMCID: PMC11085376 DOI: 10.3390/molecules29091989] [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: 03/22/2024] [Revised: 04/22/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
Varietal volatile compounds are characteristic of each variety of grapes and come from the skins of the grapes. This work focuses on the development of a methodology for the analysis of free compounds in grapes from Trincadeira, Cabernet Sauvignon, Syrah, Castelão and Tinta Barroca from the 2021 and 2022 harvests, using HS-SPME-GC × GC-TOFMS. To achieve this purpose, a previous optimization step of sample preparation was implemented, with the optimized conditions being 4 g of grapes, 2 g of NaCl, and 2 mL of H2O. The extraction conditions were also optimized, and it was observed that performing the extraction for 40 min at 60 °C was the best for identifying more varietal compounds. The fiber used was a triple fiber of carboxen/divinylbenzene/polydimethylsiloxane (CAR/DVB/PDMS). In addition to the sample preparation, the analytical conditions were also optimized, enabling the adequate separation of analytes. Using the optimized methodology, it was possible to identify fifty-two free volatile compounds, including seventeen monoterpenes, twenty-eight sesquiterpenes, and seven C13-norisoprenoids. It was observed that in 2021, more free varietal volatile compounds were identifiable compared to 2022. According to the results obtained through a linear discriminant analysis (LDA), the differences in volatile varietal signature are observed both among different grape varieties and across different years.
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Affiliation(s)
- Daniela Fonseca
- Mediterranean Institute for Agriculture, Environment and Development & Institute of Research and Advanced Training, University of Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal;
| | - Nuno Martins
- Mediterranean Institute for Agriculture, Environment and Development & Global Change and Sustainability Institute, University of Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; (N.M.); (R.G.)
| | - Raquel Garcia
- Mediterranean Institute for Agriculture, Environment and Development & Global Change and Sustainability Institute, University of Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; (N.M.); (R.G.)
- Department of Crop Science, School of Science and Technology, University of Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal
| | - Maria João Cabrita
- Mediterranean Institute for Agriculture, Environment and Development & Global Change and Sustainability Institute, University of Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; (N.M.); (R.G.)
- Department of Crop Science, School of Science and Technology, University of Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal
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2
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Dunkle MN, Benedetti C, Pijcke P, van Belzen R, Boekwa M, Mitsios M, Ruitenbeek M, Bellos G. Comparing different methods for olefin quantification in pygas and plastic pyrolysis oils: Gas chromatography-vacuum ultraviolet detection versus comprehensive gas chromatography versus bromine number titration. J Chromatogr A 2024; 1713:464569. [PMID: 38091845 DOI: 10.1016/j.chroma.2023.464569] [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: 10/19/2023] [Revised: 12/04/2023] [Accepted: 12/07/2023] [Indexed: 01/08/2024]
Abstract
In steam cracking, upstream pyrolysis oil hydroprocessing, and in many downstream processes, olefinic content is key to assess process performance and process safety risk associated with highly exothermic reactions. When looking to plastic pyrolysis oils as a potential feedstock, as well as downstream products such as pyrolysis gasoline (pygas), these materials contain unsaturated hydrocarbons which are not present in fossil feedstocks. Pygas is a product of pyrolysis and exhibits a large number of chemical structural similarities with plastic pyrolysis oils, especially in terms of olefins structure. Quantification of the unsaturation content (olefins and di-olefins) is extremely important in industry, hence the focus of this manuscript. Detailed hydrocarbon analysis with flame ionization detection is inadequate to fully characterize the hydrocarbon composition of such samples, especially when peaks are closely eluting, or even co-eluting. In this study, the gas chromatography coupled to vacuum ultraviolet (GC-VUV) detection method previously described for the analysis of liquid hydrocarbon streams1 and plastic pyrolysis oils2 has been compared with comprehensive gas chromatography (GC × GC) and the industry standard for olefin quantification (i.e., bromine number titration). Although based on different methodologies, a correlation between the olefin content obtained from GC-VUV and the bromine number titration method is hereby presented.
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Affiliation(s)
- Melissa N Dunkle
- Dow Benelux BV, P.O. Box 48, 4530 AA, Terneuzen, The Netherlands.
| | - Cesare Benedetti
- Dow Benelux BV, P.O. Box 48, 4530 AA, Terneuzen, The Netherlands
| | - Pascal Pijcke
- Dow Benelux BV, P.O. Box 48, 4530 AA, Terneuzen, The Netherlands
| | - Ramon van Belzen
- Dow Benelux BV, P.O. Box 48, 4530 AA, Terneuzen, The Netherlands
| | - Mbambo Boekwa
- Dow Benelux BV, P.O. Box 48, 4530 AA, Terneuzen, The Netherlands
| | - Marios Mitsios
- Dow Benelux BV, P.O. Box 48, 4530 AA, Terneuzen, The Netherlands
| | | | - George Bellos
- Dow Benelux BV, P.O. Box 48, 4530 AA, Terneuzen, The Netherlands
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3
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Lelevic A, Geantet C, Lorentz C, Moreaud M, Souchon V. Score Function for the Optimization of the Performance of Forward Fill/Flush Differential Flow Modulation for Comprehensive Two-Dimensional Gas Chromatography. J Chromatogr Sci 2023; 62:8-20. [PMID: 36919660 DOI: 10.1093/chromsci/bmad019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Indexed: 03/16/2023]
Abstract
Modulation is the key element of the comprehensive 2D gas chromatography separation. Forward fill/flush flow modulation is cost effective, robust and suitable for analysis of a wide range of samples. Even though this modulation system is well known, studies regarding its optimization are sparse. In this work, based on hundreds of experiments involving multiple column sets and modulation conditions, an approach was proposed that permits to facilitate the choice of the forward fill/flush flow modulation parameters. A score function was developed that allows to predict the forward fill/flush flow modulation process efficiency as judged by the modulated peak shape. The score function was based on the physical rules for optimized and quantitative forward fill/flush flow modulation proposed in our previous work, which state that the sum of the fill and flush modulation distances should be close to the modulation channel length and that the ratio of the flush and fill distances should be sufficiently high for efficient channel flushing. The score function was embedded in a freely available tool in the form of a forward fill/flush flow modulation calculator, which allows the user either to quickly check the relevancy of the modulation operating conditions or to obtain a suggestion for optimal modulation parameters.
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Affiliation(s)
- Aleksandra Lelevic
- IFP Energies nouvelles, Rond-point de l'échangeur de Solaize BP 3, 69360 Solaize, France
- Université de Lyon, Université Claude Bernard Lyon 1, Ircelyon, CNRS, Villeurbanne, F-69626 Lyon, France
| | - Christophe Geantet
- Université de Lyon, Université Claude Bernard Lyon 1, Ircelyon, CNRS, Villeurbanne, F-69626 Lyon, France
| | - Chantal Lorentz
- Université de Lyon, Université Claude Bernard Lyon 1, Ircelyon, CNRS, Villeurbanne, F-69626 Lyon, France
| | - Maxime Moreaud
- IFP Energies nouvelles, Rond-point de l'échangeur de Solaize BP 3, 69360 Solaize, France
| | - Vincent Souchon
- IFP Energies nouvelles, Rond-point de l'échangeur de Solaize BP 3, 69360 Solaize, France
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4
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Chow HYJ, Górecki T. Second-Dimension Temperature Programming System for Comprehensive Two-Dimensional Gas Chromatography. Part 2: Technical Improvements and Compatibility with Flow Modulation and Time-of-Flight Mass Spectrometry. Anal Chem 2023; 95:8164-8171. [PMID: 37201205 DOI: 10.1021/acs.analchem.3c00093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The second-dimension (2D) temperature programming system (2DTPS) for comprehensive two-dimensional gas chromatography (GC × GC) described in Part 1 was updated and tested with the time-of-flight mass spectrometer (TOFMS) and flow modulator. Addition of a real-time clock and remote port allowed the 2DTPS to be a truly standalone system to be used with any GC × GC instrument. GC × GC reproducibility with the 2DTPS was tested with thermal and flow modulation, coupled with the TOFMS and/or FID to demonstrate compatibility with all typical GC × GC setups. An improvement in the match factor, reverse match factor, and signal-to-noise ratio was found when performing 2D temperature programming. Within-day and day-to-day reproducibility of the 2DTPS for the 1D retention time (≤0.04 and ≤0.05%), 2D retention time (≤0.36 and ≤0.52%), and peak area (≤2.47 and ≤3.37%) were acceptable, while providing flexibility in 2D optimization and improved peak capacity.
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Affiliation(s)
- Hei Yin J Chow
- Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Tadeusz Górecki
- Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
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5
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Dolgushev PA, Shashkov MV. High-Temperature Two-Dimensional Gas Chromatography with Flow Modulator for Analyzing Complex Objects of Catalytic Processing. Chromatographia 2023. [DOI: 10.1007/s10337-022-04210-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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6
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Moreira de Oliveira A, Alberto Teixeira C, Wang Hantao L. Evaluation of the retention profile in flow-modulated comprehensive two-dimensional gas chromatography and independent component analysis of weathered heavy oils. Microchem J 2022. [DOI: 10.1016/j.microc.2021.106978] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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7
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Boegelsack N, Hayes K, Sandau C, Withey JM, McMartin DW, O'Sullivan G. Method development for optimizing analysis of ignitable liquid residues using flow-modulated comprehensive two-dimensional gas chromatography. J Chromatogr A 2021; 1656:462495. [PMID: 34537663 DOI: 10.1016/j.chroma.2021.462495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/29/2021] [Accepted: 08/23/2021] [Indexed: 01/11/2023]
Abstract
The abundance and composition of matrix compounds in fire debris samples undergoing ignitable liquid residue analysis frequently leads to inconclusive results, which can be diminished by applying comprehensive two-dimensional gas chromatography (GC × GC). Method development must be undertaken to fully utilize the potential of GC × GC by maximizing separation space and resolution.. The three main areas to consider for method development are column selection, modulator settings and parameter optimization. Seven column combinations with different stationary phase chemistry, column dimensions and orthogonality were assessed for suitability based on target compound selectivity, retention, resolution, and peak shapes, as well as overall peak capacity and area use. Using Box-Behnken design of experimentation (DoE), the effect of modulator settings such as flow ratio and loop fill capacity were evaluated using carbon loading potential, dilution effect, as well as target peak amplitude and skewing effect. The run parameters explored for parameter optimization were oven programming, inlet pressure (column flow rate), and modulation period. Comparing DoE approaches, Box-Behnken and Doehlert designs assessed sensitivity, selectivity, peak capacity, and wraparound; alongside target peak retention, resolution, and shape evaluation. Certified reference standards and simulated wildfire debris were used for method development and verification, and wildfire debris case samples scrutinized for method validation. The final method employed a low polarity column (5% diphenyl) coupled to a semi-polar column (50% diphenyl) and resulted in an average Separation Number (SN) exceeding 1 in both dimensions after optimization. Separation Numbers of 18.16 for first and 1.46 for second dimension without wraparound for compounds with at least four aromatic rings signified successful separation of all target compounds from varied matrix compositions and allowed for easy visual comparison of extracted ion profiles. Mass spectrometry (MS) was required during validation to differentiate ions where no baseline separation between target compounds and extraneous matrix compounds was possible. The resulting method was evaluated against ASTM E1618 and found to be an ideal routine analysis method providing great resolution of target compounds from interferences and excellent potential for ILR classification within a complex sample matrix.
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Affiliation(s)
- Nadin Boegelsack
- Department of Earth and Environmental Sciences, Mount Royal University, 4825 Mount Royal Gate SW, Calgary, AB Canada, T3E 6K6; Department of Civil, Geological and Environmental Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK Canada, S7N 5A9.
| | - Kevin Hayes
- Department of Earth and Environmental Sciences, Mount Royal University, 4825 Mount Royal Gate SW, Calgary, AB Canada, T3E 6K6; Manchester Metropolitan University, Ecology & Environment Research Centre, Chester Street, Manchester, U.K., M1 5GD
| | - Court Sandau
- Department of Earth and Environmental Sciences, Mount Royal University, 4825 Mount Royal Gate SW, Calgary, AB Canada, T3E 6K6; Chemistry Matters Inc., 104-1240 Kensington Rd NW Suite 405, Calgary, AB Canada, T2N 3P7
| | - Jonathan M Withey
- Department of Chemistry and Physics, Mount Royal University, 4825 Mount Royal Gate SW, Calgary, AB Canada, T3E 6K6
| | - Dena W McMartin
- Department of Civil, Geological and Environmental Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK Canada, S7N 5A9
| | - Gwen O'Sullivan
- Department of Earth and Environmental Sciences, Mount Royal University, 4825 Mount Royal Gate SW, Calgary, AB Canada, T3E 6K6
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8
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Novaes FJM, Marriott PJ. Cryogenic trapping as a versatile approach for sample handling, enrichment and multidimensional analysis in gas chromatography. J Chromatogr A 2021; 1644:462135. [PMID: 33839448 DOI: 10.1016/j.chroma.2021.462135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/28/2021] [Accepted: 03/30/2021] [Indexed: 12/14/2022]
Abstract
Cryogenic methods - those that employ cryogenic fluids/gases but also other approaches to generate reduced temperature - are versatile, functional and relatively easily implemented as part of a total gas chromatographic method. The general utility of a cold region is almost invariably as a trapping or focussing step, to collect analyte into a sharp zone. The success in effectively trapping analyte depends on analyte volatility and the temperature of the cold region. Analytes collection into a sorbent phase supported by cryotrapping usually provide a greater capacity trapping for the sorption step. Stripping analyte from a sample into a cryogenic trap, with subsequent introduction to GC as in a purge-and-trap method, sample introduction into an injector with incorporation of a cooling zone, manipulation and management of chromatographic bands during chromatography elution such as employed in multidimensional gas chromatography, and focussing analyte just prior to the detector, all have the same goal of concentrating the band, reducing its dispersion, and maximising response. This review summarises various approaches that demonstrate how cryogenic methods have been incorporated into gas chromatographic analysis.
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Affiliation(s)
- Fábio Junior Moreira Novaes
- Universidade Federal de Viçosa, Departamento de Química, Avenida Peter Henry Rolfs, s/n, Viçosa, MG 36570-900, Brazil; Universidade Federal do Rio de Janeiro, Instituto de Química, Programa de Pós-Graduação em Química, Avenida Athos da Silveira Ramos, 149, Bloco A, 6° Andar, Sala 626, Rio de Janeiro, RJ 21941-909, Brazil.
| | - Philip John Marriott
- Australian Centre for Research on Separation Science, School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia.
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9
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Janta P, Pinyo D, Yodta Y, Vasasiri P, Weidenbach M, Pursch M, Yang X(G, Kulsing C. Strategies towards simpler configuration and higher peak capacity with comprehensive multidimensional gas chromatography. RSC Adv 2021; 11:7946-7953. [PMID: 35423345 PMCID: PMC8695086 DOI: 10.1039/d0ra10495g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 02/07/2021] [Indexed: 11/21/2022] Open
Abstract
Experimental and data analysis approaches in multidimensional gas chromatography (MDGC) comprising comprehensive multiple heart-cut (H/C) and comprehensive two dimensional GC (GC × GC) were developed with an example application illustrated for analysis of a technical glycol precursor sample. The GC × GC system employed a long 1D (30 m) and a short 2D (5 m) column with a flow modulator and a Deans switch (DS) as a splitter; meanwhile. The H/C system was applied solely as a DS located between long 1D (30 m) and 2D (60 m) columns without use of cryogenic trapping devices. The effects of injection time and 2D column flow in GC × GC and the impacts of H/C window and number of injections (total analysis time) in H/C analysis were investigated. The analysis performance for each condition was evaluated according to peak capacity and number of separated compounds. The continuum between the two techniques was then established via the relationship between analysis time and analysis performance. The separation performances were improved with longer analysis time so that the suitable condition was selected within this compromise. Under the selected conditions, volatile compounds in the technical glycol precursor sample were identified according to the match between the experimental MS spectra and first dimensional retention indices (1I) with that from the NIST2014 database and literature. An hour analysis with GC × GC resulted in a total peak capacity of 798, number of separated peaks of 61 and average MS match score of 887 ± 35; meanwhile, the corresponding numbers were improved to be 9198, 107 and 898 ± 24, respectively, with the 25 h comprehensive H/C analysis. Experimental and data analysis approaches in MDGC comprising comprehensive H/C and GC × GC were developed with an example application illustrated for analysis of a technical glycol precursor sample.![]()
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Affiliation(s)
- Pannipa Janta
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University
- Bangkok 10330
- Thailand
| | - Duangkamol Pinyo
- The Center for Advanced Analytical Technology
- Dow Chemical Thailand Ltd
- Rayong 21150
- Thailand
| | - Yamonporn Yodta
- The Center for Advanced Analytical Technology
- Dow Chemical Thailand Ltd
- Rayong 21150
- Thailand
| | - Porames Vasasiri
- The Center for Advanced Analytical Technology
- Dow Chemical Thailand Ltd
- Rayong 21150
- Thailand
| | | | - Matthias Pursch
- Analytical Science
- Dow Deutschland Anlagen GmbH
- 21677 Stade
- Germany
| | | | - Chadin Kulsing
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University
- Bangkok 10330
- Thailand
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10
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Comparison of Thermal and Flow-Based Modulation in Comprehensive Two-Dimensional Gas Chromatography—Time-of-Flight Mass Spectrometry (GC × GC-TOFMS) for the Analysis of Base Oils. SEPARATIONS 2020. [DOI: 10.3390/separations7040070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Base oils are produced by refining crude oil or through chemical synthesis. They are a key component of engine oils. With an immense range of carbon numbers and boiling points, analyzing such complex mixtures is very difficult. The need to monitor industrial petroleum processing steps, as well as to identify petrochemical environmental pollutants, drives the search for improved characterization methods. Comprehensive two-dimensional gas chromatography (GC × GC) is one of the best tools for that. The modulator used in GC × GC is responsible for trapping/sampling the first dimension (1D) column analytes, then reinjecting them in the form of narrow bands onto the second dimension (2D) column for further separation. Modulators used today generally fall into two categories, thermal and flow ones. Heater-based thermal modulators trap the 1D column effluent at or above ambient temperatures. Flow-based modulators utilize storage loop(s) to collect the 1D effluent, which is subsequently flushed into the second-dimension column for further separation. A single-stage, consumable-free thermal modulator and a reverse fill/flush flow modulator were compared for the characterization of base oils. Both were evaluated on their ability to achieve separation of several conventional and synthetic engine oils components. A reverse column set, polar 1D and nonpolar 2D, allowed group-type analysis of all classes, including linear, branched, and aromatic species. The results show the ability to achieve a comprehensive separation of specific compound classes and the differentiation of engine oil types and manufacturers. Soft ionization assisted in tentative identification of two alkylated diphenylamines in each sample. The advantages and limitations of both thermal and flow modulation are presented.
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11
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Boegelsack N, Sandau C, McMartin DW, Withey JM, O'Sullivan G. Development of retention time indices for comprehensive multidimensional gas chromatography and application to ignitable liquid residue mapping in wildfire investigations. J Chromatogr A 2020; 1635:461717. [PMID: 33254004 DOI: 10.1016/j.chroma.2020.461717] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 11/07/2020] [Accepted: 11/09/2020] [Indexed: 01/07/2023]
Abstract
In this study, we introduce a simple three-step workflow for a universally applicable RI system, to be used in GC×GC analysis of ignitable liquid residue (ILR) for arson investigations. The proposed RI system applies a combination of two well-established GC RI systems: non-isothermal Kovats (K) index in the first dimension and Lee (L) index in the second dimension. The proposed KLI RI system showed very good correlations when compared with predicted values and existing RI systems (r2 = 0.97 in first dimension, r2 = 0.99 in second dimension) and was valid for a wide range of analyte concentrations and operational settings (coefficient of variance (CV) < 1% in first dimension, < 10% in second dimension). Using the KLI RI, an ILR classification contour map was created to assist with the identification of ILR types within ASTM E1618. The contour map was successfully applied to neat fuels and a fire scene sample, highlighting the application to wildfire investigation. Standardizing the RI process and establishing acceptable error margins allows the exploration and comparison of comprehensive data generated from GC×GC analysis of ILRs regardless of location, time, or system, further enhancing comprehensive and tenable chemometric analyses of samples. Overall, the KLI workflow was inexpensive, quick to apply, and user-friendly with its simple 3-step design.
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Affiliation(s)
- Nadin Boegelsack
- Department of Earth and Environmental Sciences, Mount Royal University, 4825 Mount Royal Gate SW, Calgary, AB Canada, T3E 6K6; Department of Civil, Geological and Environmental Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK Canada, S7N 5A9.
| | - Court Sandau
- Department of Earth and Environmental Sciences, Mount Royal University, 4825 Mount Royal Gate SW, Calgary, AB Canada, T3E 6K6; Chemistry Matters Inc., 104-1240 Kensington Rd NW Suite 405, Calgary, AB Canada, T2N 3P7
| | - Dena W McMartin
- Department of Civil, Geological and Environmental Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK Canada, S7N 5A9
| | - Jonathan M Withey
- Department of Chemistry and Physics, Mount Royal University, 4825 Mount Royal Gate SW, Calgary, AB Canada, T3E 6K6
| | - Gwen O'Sullivan
- Department of Earth and Environmental Sciences, Mount Royal University, 4825 Mount Royal Gate SW, Calgary, AB Canada, T3E 6K6
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12
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Development of gas chromatographic pattern recognition and classification tools for compliance and forensic analyses of fuels: A review. Anal Chim Acta 2020; 1132:157-186. [DOI: 10.1016/j.aca.2020.07.027] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 06/12/2020] [Accepted: 07/14/2020] [Indexed: 01/29/2023]
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13
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Stilo F, Gabetti E, Bicchi C, Carretta A, Peroni D, Reichenbach SE, Cordero C, McCurry J. A step forward in the equivalence between thermal and differential-flow modulated comprehensive two-dimensional gas chromatography methods. J Chromatogr A 2020; 1627:461396. [DOI: 10.1016/j.chroma.2020.461396] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 12/18/2022]
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14
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Lelevic A, Souchon V, Geantet C, Lorentz C, Moreaud M. Quantitative performance of forward fill/flush differential flow modulation for comprehensive two-dimensional gas chromatography. J Chromatogr A 2020; 1626:461342. [PMID: 32797823 DOI: 10.1016/j.chroma.2020.461342] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/27/2020] [Accepted: 06/11/2020] [Indexed: 10/24/2022]
Abstract
GC × GC is an advanced separation technique allowing to achieve quantitative and qualitative characterization of complex samples. In order to perform two-dimensional separation, the system must provide suitable peak modulation which will direct short impulses of first column flow towards the second column. Forward fill/ flush differential flow modulation is a cost effective and no cryogen requiring approach which allows modulation over a wide range of analytes with very different boiling points. However, optimization of the flow modulation process can be difficult to understand and quantification performance might be compromised if the parameters of the modulation process are not properly set. Modulated peak shape can be a good indication of the efficiency of the modulation process, however it is not sufficient to guarantee good quantification. Different average velocities in the beginning and the end of the thermally programmed GC run may cause different efficiency of the modulation process in various parts of the chromatogram. The purpose of this work is to investigate quantitative performance of the forward/fill flush modulation and delineate parameters that determine the effectiveness of the modulation process and its ability to properly reflect the quantitative composition of the investigated sample.
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Affiliation(s)
- Aleksandra Lelevic
- IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize BP 3 69360 Solaize France; Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON UMR 5256, F-69626 Villeurbanne, France.
| | - Vincent Souchon
- IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize BP 3 69360 Solaize France
| | - Christophe Geantet
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON UMR 5256, F-69626 Villeurbanne, France
| | - Chantal Lorentz
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON UMR 5256, F-69626 Villeurbanne, France
| | - Maxime Moreaud
- IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize BP 3 69360 Solaize France
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15
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Metabolic Profiling of Varronia curassavica Jacq. Terpenoids by Flow Modulated Two-Dimensional Gas Chromatography Coupled to Mass Spectrometry. SEPARATIONS 2020. [DOI: 10.3390/separations7010018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
In this study, a metabolomic approach was used to investigate the effect of seasonality on the chemical composition and yield of anti-inflammatory active principle, α-humulene, in the essential oil of three genotypes of Varronia curassavica Jacq. (Syn. Cordia verbenaceae). The essential oils were extracted by hydrodistillation and analyzed by comprehensive two-dimensional gas chromatography coupled to mass spectrometry (GC×GC-MS). The GC×GC approach a three-fold improvement in qualitative analysis (48 compounds were identified by GC-MS versus 135 by GC×GC-MS). The improved resolving power of GC×GC resolved important coelutions and enabled the detection of unusual substances in V. curassavica essential oil. The chromatographic data was analyzed by using peak table-based chemometrics, namely, principal component analysis (PCA) and hierarchical cluster analysis (HCA). The metabolic study showed that seasonality has a significant effect on the chemical composition. The α-humulene content was affected by genotype and season. Spring and summer were the best harvest seasons for the yield of the active ingredient, found in higher concentrations in the VC2 genotype. The proposed metabolomic workflow was successfully applied to terpene analysis found in V. curassavica essential oil, and such results have broadened our understanding of the influence of seasonal factors on the specialized metabolism of the species.
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Hung NV, Mohabeer C, Vaccaro M, Marcotte S, Agasse-Peulon V, Abdelouahed L, Taouk B, Cardinael P. Development of two-dimensional gas chromatography (GC×GC) coupled with Orbitrap-technology-based mass spectrometry: Interest in the identification of biofuel composition. JOURNAL OF MASS SPECTROMETRY : JMS 2020; 55:e4495. [PMID: 31903666 DOI: 10.1002/jms.4495] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/17/2019] [Accepted: 12/29/2019] [Indexed: 06/10/2023]
Abstract
Comprehensive gas chromatography (GC) has emerged in recent years as the technique of choice for the analysis of volatile and semivolatile compounds in complex matrices. Coupling it with high-resolution mass spectrometry (MS) makes a powerful tool for identification and quantification of organic compounds. The results obtained in this study showed a significant improvement by using GC×GC-EI-MS in comparison with GC-EI-MS; the separation of chromatogram peaks was highly improved, which facilitated detection and identification. However, the limitation of Orbitrap mass analyzer compared with time-of-flight analyzer is the data acquisition rate; the frequency average was about 25 Hz at a mass resolving power of 15.000, which is barely sufficient for the proper reconstruction of the narrowest chromatographic peaks. On the other hand, the different spectra obtained in this study showed an average mass accuracy of about 1 ppm. Within this average mass accuracy, some reasonable elemental compositions can be proposed and combined with characteristic fragment ions, and the molecules can be identified with precision. At a mass resolving power of 7.500, the scan rate reaches 43 Hz and the GC×GC-MS peaks can be represented by more than 10 data points, which should be sufficient for quantification. The GC×GC-MS was also applied to analyze a cellulose bio-oil sample. Following this, a highly resolved chromatogram was obtained, allowing EI mass spectra containing molecular and fragment ions of many distinct molecules present in the sample to be identified.
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Affiliation(s)
- Nguyen Viet Hung
- Laboratoire SMS-EA3233, UNIROUEN, Normandie Université, Place Emile Blondel, F-76821, Mont-Saint-Aignan Cedex, France
| | - Chetna Mohabeer
- Laboratoire de Sécurité des Procédés Chimiques, LSPC EA-4704, Normandie Univ, INSA Rouen Normandie, UNIROUEN, 76000, Rouen, France
| | - Marie Vaccaro
- Laboratoire SMS-EA3233, UNIROUEN, Normandie Université, Place Emile Blondel, F-76821, Mont-Saint-Aignan Cedex, France
| | - Stéphane Marcotte
- Normandie Université, INSA de Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Avenue del'Université, 76800, Saint-Etienne-du-Rouvray, France
| | - Valérie Agasse-Peulon
- Laboratoire SMS-EA3233, UNIROUEN, Normandie Université, Place Emile Blondel, F-76821, Mont-Saint-Aignan Cedex, France
| | - Lokmane Abdelouahed
- Laboratoire de Sécurité des Procédés Chimiques, LSPC EA-4704, Normandie Univ, INSA Rouen Normandie, UNIROUEN, 76000, Rouen, France
| | - Bechara Taouk
- Laboratoire de Sécurité des Procédés Chimiques, LSPC EA-4704, Normandie Univ, INSA Rouen Normandie, UNIROUEN, 76000, Rouen, France
| | - Pascal Cardinael
- Laboratoire SMS-EA3233, UNIROUEN, Normandie Université, Place Emile Blondel, F-76821, Mont-Saint-Aignan Cedex, France
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Trinklein TJ, Gough DV, Warren CG, Ochoa GS, Synovec RE. Dynamic pressure gradient modulation for comprehensive two-dimensional gas chromatography. J Chromatogr A 2020; 1609:460488. [DOI: 10.1016/j.chroma.2019.460488] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 08/22/2019] [Accepted: 08/26/2019] [Indexed: 11/28/2022]
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Amaral MSS, Nolvachai Y, Marriott PJ. Comprehensive Two-Dimensional Gas Chromatography Advances in Technology and Applications: Biennial Update. Anal Chem 2019; 92:85-104. [DOI: 10.1021/acs.analchem.9b05412] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Michelle S. S. Amaral
- Australian Centre for Research on Separation Science, School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia
| | - Yada Nolvachai
- Australian Centre for Research on Separation Science, School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia
| | - Philip J. Marriott
- Australian Centre for Research on Separation Science, School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia
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Aspromonte J, Wolfs K, Adams E. Current application and potential use of GC × GC in the pharmaceutical and biomedical field. J Pharm Biomed Anal 2019; 176:112817. [DOI: 10.1016/j.jpba.2019.112817] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/14/2019] [Accepted: 08/17/2019] [Indexed: 01/25/2023]
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21
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Column selection approach to achieve a high peak capacity in comprehensive three-dimensional gas chromatography. Talanta 2019; 195:822-829. [DOI: 10.1016/j.talanta.2018.12.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 12/03/2018] [Accepted: 12/04/2018] [Indexed: 11/15/2022]
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22
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Potgieter H, de Coning P, Bekker R, Rohwer E, Amirav A. The pre-separation of oxygen containing compounds in oxidised heavy paraffinic fractions and their identification by GC-MS with supersonic molecular beams. JOURNAL OF MASS SPECTROMETRY : JMS 2019; 54:328-341. [PMID: 30720234 DOI: 10.1002/jms.4340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 01/21/2019] [Accepted: 01/28/2019] [Indexed: 06/09/2023]
Abstract
The heavy petroleum fractions produced during refining processes need to be upgraded to useable products to increase their value. Hydrogenated heavy paraffinic fractions can be oxidised to produce high value products that contain a variety of oxygenates. These heavy oxygenated paraffinic fractions need to be characterised to enable the control of oxidation processes and to understand product properties. The accurate identification of the oxygenates present in these fractions by electron ionisation (EI) mass spectrometry is challenging due to the complexity of these heavy fractions. Adding to this challenge is the limited applicability of EI mass spectral libraries due to the absence of molecular ions from the EI mass spectra of many oxygenates. The separation of oxygenates from the complex hydrocarbon matrix prior to high temperature GC-MS (HT-GC-MS) analysis reduces the complexity of these fractions and assists in the accurate identification of these oxygenates. Solid phase extraction (SPE) and supercritical fluid chromatography (SFC) were employed as prefractionation techniques. GC-MS with supersonic molecular beams (SMBs) (also named GC-MS with cold-EI) utilises a SMB interface with which EI is done with vibrationally cold sample compounds in a fly-through ion source (cold-EI) resulting in a substantial increase in the molecular ion signal intensity in the mass spectrum. This greatly enhances the accurate identification of the oxygenates in these fractions. This study investigated the ionisation behaviour of oxygenated compounds using cold-EI. The prefractionation by SPE and SFC and the subsequent analysis with GC-MS with cold-EI were applied to an oxygenated heavy paraffinic fraction.
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Affiliation(s)
- Hein Potgieter
- Operations and Analytics Department, Group Technology R&T, Sasol, Sasolburg, South Africa
| | - Piet de Coning
- Operations and Analytics Department, Group Technology R&T, Sasol, Sasolburg, South Africa
| | - Riaan Bekker
- Operations and Analytics Department, Group Technology R&T, Sasol, Sasolburg, South Africa
| | - Egmont Rohwer
- Department of Chemistry, University of Pretoria, Pretoria, South Africa
| | - Aviv Amirav
- School of Chemistry, Tel Aviv University, Tel Aviv, Israel
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Bahaghighat HD, Freye CE, Synovec RE. Recent advances in modulator technology for comprehensive two dimensional gas chromatography. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2018.04.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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24
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Cordero C, Kiefl J, Reichenbach SE, Bicchi C. Characterization of odorant patterns by comprehensive two-dimensional gas chromatography: A challenge in omic studies. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2018.06.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Bahaghighat HD, Freye CE, Gough DV, Synovec RE. Comprehensive two-dimensional gas chromatography and time-of-flight mass spectrometry detection with a 50 ms modulation period. J Chromatogr A 2019; 1583:117-123. [DOI: 10.1016/j.chroma.2018.11.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 11/07/2018] [Accepted: 11/15/2018] [Indexed: 10/27/2022]
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26
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Giardina M, McCurry JD, Cardinael P, Semard-Jousset G, Cordero C, Bicchi C. Development and validation of a pneumatic model for the reversed-flow differential flow modulator for comprehensive two-dimensional gas chromatography. J Chromatogr A 2018; 1577:72-81. [DOI: 10.1016/j.chroma.2018.09.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 09/04/2018] [Accepted: 09/14/2018] [Indexed: 12/20/2022]
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Magagna F, Liberto E, Reichenbach SE, Tao Q, Carretta A, Cobelli L, Giardina M, Bicchi C, Cordero C. Advanced fingerprinting of high-quality cocoa: Challenges in transferring methods from thermal to differential-flow modulated comprehensive two dimensional gas chromatography. J Chromatogr A 2018; 1536:122-136. [DOI: 10.1016/j.chroma.2017.07.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 05/02/2017] [Accepted: 07/04/2017] [Indexed: 11/30/2022]
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29
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Freye CE, Bahaghighat HD, Synovec RE. Comprehensive two-dimensional gas chromatography using partial modulation via a pulsed flow valve with a short modulation period. Talanta 2018; 177:142-149. [DOI: 10.1016/j.talanta.2017.08.095] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 08/28/2017] [Accepted: 08/29/2017] [Indexed: 10/18/2022]
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30
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Prebihalo SE, Berrier KL, Freye CE, Bahaghighat HD, Moore NR, Pinkerton DK, Synovec RE. Multidimensional Gas Chromatography: Advances in Instrumentation, Chemometrics, and Applications. Anal Chem 2017; 90:505-532. [DOI: 10.1021/acs.analchem.7b04226] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Sarah E. Prebihalo
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - Kelsey L. Berrier
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - Chris E. Freye
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - H. Daniel Bahaghighat
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
- Department of Chemistry and Life Science, United States Military Academy, West Point, New York 10996, United States
| | - Nicholas R. Moore
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - David K. Pinkerton
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - Robert E. Synovec
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
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Potgieter H, Bekker R, Beigley J, Rohwer E. Analysis of oxidised heavy paraffininc products by high temperature comprehensive two-dimensional gas chromatography. J Chromatogr A 2017. [DOI: 10.1016/j.chroma.2017.06.046] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Thermal desorption comprehensive two-dimensional gas chromatography coupled to variable-energy electron ionization time-of-flight mass spectrometry for monitoring subtle changes in volatile organic compound profiles of human blood. J Chromatogr A 2017; 1501:117-127. [DOI: 10.1016/j.chroma.2017.04.026] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 04/05/2017] [Accepted: 04/09/2017] [Indexed: 01/04/2023]
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33
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Retention modeling and retention time prediction in gas chromatography and flow-modulation comprehensive two-dimensional gas chromatography: The contribution of pressure on solute partition. J Chromatogr A 2017; 1485:101-119. [DOI: 10.1016/j.chroma.2017.01.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 12/12/2016] [Accepted: 01/03/2017] [Indexed: 11/19/2022]
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34
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Cordero C, Rubiolo P, Reichenbach SE, Carretta A, Cobelli L, Giardina M, Bicchi C. Method translation and full metadata transfer from thermal to differential flow modulated comprehensive two dimensional gas chromatography: Profiling of suspected fragrance allergens. J Chromatogr A 2017; 1480:70-82. [DOI: 10.1016/j.chroma.2016.12.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 11/19/2016] [Accepted: 12/07/2016] [Indexed: 02/03/2023]
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35
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Comparison of the performance of forward fill/flush and reverse fill/flush flow modulation in comprehensive two-dimensional gas chromatography. J Chromatogr A 2016; 1466:113-28. [DOI: 10.1016/j.chroma.2016.08.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 08/10/2016] [Accepted: 08/11/2016] [Indexed: 11/17/2022]
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36
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Collin WR, Nuñovero N, Paul D, Kurabayashi K, Zellers ET. Comprehensive two-dimensional gas chromatographic separations with a temperature programmed microfabricated thermal modulator. J Chromatogr A 2016; 1444:114-22. [DOI: 10.1016/j.chroma.2016.03.072] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 03/23/2016] [Accepted: 03/23/2016] [Indexed: 01/25/2023]
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37
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Potential of the reversed-inject differential flow modulator for comprehensive two-dimensional gas chromatography in the quantitative profiling and fingerprinting of essential oils of different complexity. J Chromatogr A 2015; 1417:79-95. [DOI: 10.1016/j.chroma.2015.09.027] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 09/09/2015] [Accepted: 09/09/2015] [Indexed: 12/16/2022]
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