1
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Su Y, Li Y, Tan C, Zeng R, Hua Y, Hu J, Wang L. Rapid identification of flaxseed oil based on portable fiber optic Raman spectroscopy combined with an oil microscopy method. J Food Sci 2022; 87:3407-3418. [PMID: 35781811 DOI: 10.1111/1750-3841.16234] [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: 03/01/2022] [Revised: 05/16/2022] [Accepted: 06/02/2022] [Indexed: 11/30/2022]
Abstract
To explore a fast, simple, and accurate method to identify adulteration in flaxseed oil, the Raman spectral data of 130 samples containing flaxseed, canola, cottonseed, and adulterated oils were obtained using a portable fiber optic Raman spectrometer. The Raman spectral results showed that the Raman spectra of the flaxseed and canola oils had noticeable peak shifts, whereas the peak positions of the flaxseed and cottonseed oils were relatively similar. Clear peak intensity differences were observed in the flaxseed, cottonseed, and canola oils, mainly at 868 cm-1 , 1022 cm-1 , 1265 cm-1 , and 1655 cm-1 , with Raman shift intensities in the following order: Iflaxseed oil > Icottonseed oil > Icanola oil . Similarly, the peak intensity of the flaxseed and adulterated oils also exhibited certain differences (at 868 cm-1 , 1022 cm-1 , 1265 cm-1 , and 1655 cm-1 ), and the Raman shift intensity tended to decrease gradually with the increasing content of canola and cottonseed oils in the flaxseed oil. Additionally, the results of Raman spectroscopy combined with the "oil microscopy" method exhibited large variations in the radar patterns of the flaxseed, canola, and cottonseed oils, whereas the radar patterns of the flaxseed and adulterated oils closely resembled each other. The results indicated that Raman spectroscopy in combination with oil microscopy more effectively revealed the subtle differences in the Raman shift intensity, serving as a more visual and comprehensive approach for differentiating the quality variations between pure flaxseed oil and other oil species and adulterated oil. PRACTICAL APPLICATION: This study analyzed the Raman spectra of flaxseed, canola, cottonseed, and adulterated oils using fiber optic Raman spectroscopy. Combined with the oil microscopy method for comprehensive evaluation and analysis, it is feasible to effectively identify the quality differences among flaxseed, canola, cottonseed, and adulterated oils.
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Affiliation(s)
- Yuancui Su
- College of Physical Science and Technology, Guangxi Normal University, Guilin, China
| | - Yuanpeng Li
- College of Physical Science and Technology, Guangxi Normal University, Guilin, China
| | - Chengsen Tan
- College of Physical Science and Technology, Guangxi Normal University, Guilin, China
| | - Rui Zeng
- College of Physical Science and Technology, Guangxi Normal University, Guilin, China
| | - Yisheng Hua
- College of Physical Science and Technology, Guangxi Normal University, Guilin, China
| | - Junhui Hu
- College of Physical Science and Technology, Guangxi Normal University, Guilin, China
| | - Lihu Wang
- College of Physical Science and Technology, Guangxi Normal University, Guilin, China
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2
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Angers P, Arul J, Jacques H. Cyclic Fatty Acid Monomers or the Potential Wild Card in
Trans
Fats. J AM OIL CHEM SOC 2020. [DOI: 10.1002/aocs.12405] [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)
- Paul Angers
- Department of Food Sciences Université Laval 2425 rue de l'Agriculture Québec QC G1V 0A6 Canada
- Institute of Nutrition and Functional Foods Université Laval 2440 boulevard Hochelaga Québec QC G1V 0A6 Canada
| | - Joseph Arul
- Department of Food Sciences Université Laval 2425 rue de l'Agriculture Québec QC G1V 0A6 Canada
- Institute of Nutrition and Functional Foods Université Laval 2440 boulevard Hochelaga Québec QC G1V 0A6 Canada
| | - Hélène Jacques
- Institute of Nutrition and Functional Foods Université Laval 2440 boulevard Hochelaga Québec QC G1V 0A6 Canada
- School of Nutrition Université Laval 2425 rue de l'Agriculture Québec QC G1V 0A6 Canada
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3
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Desmarais A, Sébédio J, Belkacemi K, Arul J, Angers P. Formation Kinetics of Monomeric Cyclic Fatty Acid Methyl Esters of Alpha‐Linolenic Acid: Effects of Mono
cis
/
trans
Isomers. J AM OIL CHEM SOC 2020. [DOI: 10.1002/aocs.12348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Amélie Desmarais
- Department of Food SciencesUniversité Laval2425 rue de l'Agriculture Québec, QC G1V 0A6 Canada
- Institute of Nutrition and Functional FoodsUniversité Laval2440 Boulevard Hochelaga Québec, QC G1V 0A6 Canada
| | - Jean‐Louis Sébédio
- Unité de Nutrition HumaineINRA Route de Theix, 63122 St Genès Champanelle France
| | - Khaled Belkacemi
- Institute of Nutrition and Functional FoodsUniversité Laval2440 Boulevard Hochelaga Québec, QC G1V 0A6 Canada
- Department of Soil and Agri‐Food EngineeringUniversité Laval 2425 rue de l'Agriculture, Québec, QC G1V 0A6 Canada
| | - Joseph Arul
- Department of Food SciencesUniversité Laval2425 rue de l'Agriculture Québec, QC G1V 0A6 Canada
- Institute of Nutrition and Functional FoodsUniversité Laval2440 Boulevard Hochelaga Québec, QC G1V 0A6 Canada
| | - Paul Angers
- Department of Food SciencesUniversité Laval2425 rue de l'Agriculture Québec, QC G1V 0A6 Canada
- Institute of Nutrition and Functional FoodsUniversité Laval2440 Boulevard Hochelaga Québec, QC G1V 0A6 Canada
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4
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Cherif A, Boukhchina S, Angers P. GC‐MS Characterization of Cyclic Fatty Acid Monomers and Isomers of Unsaturated Fatty Acids Formed During the Soybean Oil Heating Process. EUR J LIPID SCI TECH 2019. [DOI: 10.1002/ejlt.201800296] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ammar Cherif
- Faculty of SciencesDepartment of BiologyUniversity of Tunis El‐ManarTunis2092Tunisia
| | - Sadok Boukhchina
- Faculty of SciencesDepartment of BiologyUniversity of Tunis El‐ManarTunis2092Tunisia
| | - Paul Angers
- Department of Food Science and NutritionUniversity LavalQuebecQC G1V 0A6Canada
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5
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Zhang Q, Qin W, Li M, Shen Q, Saleh AS. Application of Chromatographic Techniques in the Detection and Identification of Constituents Formed during Food Frying: A Review. Compr Rev Food Sci Food Saf 2015. [DOI: 10.1111/1541-4337.12147] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Qing Zhang
- College of Food Science; Sichuan Agricultural Univ.; Ya'an 625014 Sichuan China
| | - Wen Qin
- College of Food Science; Sichuan Agricultural Univ.; Ya'an 625014 Sichuan China
| | - Meiliang Li
- College of Food Science; Sichuan Agricultural Univ.; Ya'an 625014 Sichuan China
| | - Qun Shen
- Natl. Engineering and Technology Research Center for Fruits and Vegetables; College of Food Science and Nutritional Engineering, China Agricultural Univ.; Beijing 100083 China
| | - Ahmed S.M. Saleh
- Dept. of Food Science and Technology; Faculty of Agriculture, Assiut Univ.; Assiut 71526 Egypt
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6
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Cyclic Fatty Acids Found in Frying Oils are Detoxified via Classical Drug Metabolic Pathway but also by β-Oxidation and Eliminated as Conjugates in Rats. Lipids 2015; 50:381-96. [DOI: 10.1007/s11745-015-3997-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 02/06/2015] [Indexed: 12/25/2022]
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7
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Global metabolomic profiling of human serum from obese individuals by liquid chromatography–time-of-flight/mass spectrometry to evaluate the intake of breakfasts prepared with heated edible oils. Food Chem 2013; 141:1722-31. [DOI: 10.1016/j.foodchem.2013.04.073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2012] [Revised: 04/14/2013] [Accepted: 04/20/2013] [Indexed: 01/05/2023]
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8
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Ferreiro-Vera C, Priego-Capote F, Mata-Granados JM, Luque de Castro MD. Short-term comparative study of the influence of fried edible oils intake on the metabolism of essential fatty acids in obese individuals. Food Chem 2012; 136:576-84. [PMID: 23122100 DOI: 10.1016/j.foodchem.2012.08.081] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 03/01/2012] [Accepted: 08/31/2012] [Indexed: 11/28/2022]
Abstract
The effect of breakfast intake of fried oils containing natural antioxidants or a synthetic autooxidation inhibitor on the metabolism of essential fatty acids focused on obese individuals. Serum levels of eicosanoids were compared in individuals before and after intake of different breakfasts. Univariate descriptive analysis was used to characterise the cohort selected for this study and multivariate analysis to reveal statistical differences of normalised eicosanoids concentrations (determined by solid-phase extraction coupled to LC-MS/MS) depending on the edible oil used for breakfast preparation. The results showed that the intake of breakfast prepared with pure sunflower oil subjected to deep frying causes an effect over the eicosanoids profile that enables discrimination versus the rest of individuals. The effect was a significant increase in the concentration of hydroxyoctadecadienoic acid (HODE) metabolites, indicative markers of the intake of fried oils. The concentration of HODE metabolites was lower when the oil contained either natural antioxidants from olive-oil pomace or a synthetic autooxidation inhibitor as dimethylsiloxane. The comparison of the effect of fried sunflower oils with fried extra virgin olive oil shows the benefits associated to the consumption of the latter.
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Affiliation(s)
- Carlos Ferreiro-Vera
- Department of Analytical Chemistry, Annex C-3, Campus of Rabanales, University of Córdoba, E-14071 Córdoba, Spain
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9
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Chemical alterations taken place during deep-fat frying based on certain reaction products: A review. Chem Phys Lipids 2012; 165:662-81. [DOI: 10.1016/j.chemphyslip.2012.07.002] [Citation(s) in RCA: 213] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 06/09/2012] [Accepted: 07/05/2012] [Indexed: 11/19/2022]
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10
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11
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Analytical Methods for Quantification of Modified Fatty Acids and Sterols Formed as a Result of Processing. FOOD ANAL METHOD 2008. [DOI: 10.1007/s12161-008-9055-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Mossoba M, McDonald R. Methods for trans Fatty Acid Analysis. FOOD SCIENCE AND TECHNOLOGY 2008. [DOI: 10.1201/9781420046649.ch6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Berdeaux O, Fournier V, Lambelet P, Dionisi F, Sébédio JL, Destaillats F. Isolation and structural analysis of the cyclic fatty acid monomers formed from eicosapentaenoic and docosahexaenoic acids during fish oil deodorization. J Chromatogr A 2007; 1138:216-24. [PMID: 17113094 DOI: 10.1016/j.chroma.2006.10.061] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2006] [Revised: 10/12/2006] [Accepted: 10/16/2006] [Indexed: 11/15/2022]
Abstract
Long-chain polyunsaturated fatty acids (LC-PUFAs) present in fish oils are thermolabile molecules. Among the degradation reactions encountered, thermal cyclization occurs during refining or other heat treatments. Numerous studies have been carried out in the past to quantify and determine the structures of cyclic fatty acid monomers (CFAMs) formed from oleic, linoleic and linolenic acids in heated vegetable oils. Recently, much attention have been given to LC-PUFAs due to their potential health benefits. However, data on quantification of CFAMs formed from these fatty acids, such as eicosapentaenoic acid (EPA, cis-5, cis-8, cis-11, cis-14, cis-17 20:5) and docosahexaenoic acid (DHA, cis-4, cis-7, cis-10, cis-13, cis-16, cis-19 22:6), the two main LC-PUFAs in fish oils, are scarce. In the present study, structural analyses of CFAMs formed from EPA and DHA during the deodorization of fish oil are presented. Fish oil sample was deodorized at 250 degrees C for 3 h under a pressure of 1.5 mbar in a laboratory deodorizer. The CFAMs formed during heat treatment of fish oil were isolated by a combination of saponification, esterification, urea fractionations and column chromatography. Structural analyses of C20- and C22-CFAMs were achieved by gas-chromatography electronic-ionization mass-spectrometry (GC-EI-MS) of their 4,4-dimethyloxazoline (DMOX) derivatives. We identified seven out of 13 possible structures of hydrogenated CFAMs formed from EPA, and nine out of 16 possible structures of CFAM formed from DHA. Major CFAMs from both EPA and DHA were cyclohexyl isomers. All possible cyclohexyl isomers were found but only nine out of 18 of the cyclopentyl isomers were present in concentration sufficient for identification. Chemical mechanisms involved in the formation of polyunsaturated LC-PUFAs have been investigated. The results have shown that general principle involved in the cyclization of LC-PUFAs is same as that for the thermal cyclization of oleic, linoleic and alpha-linolenic acids.
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Affiliation(s)
- Olivier Berdeaux
- UMR FLAVIC Department, INRA, 17 rue Sully, BP 86510, 21065 Dijon, Cedex, France.
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14
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Fournier V, Destaillats F, Juanéda P, Dionisi F, Lambelet P, Sébédio JL, Berdeaux O. Thermal degradation of long-chain polyunsaturated fatty acids during deodorization of fish oil. EUR J LIPID SCI TECH 2006. [DOI: 10.1002/ejlt.200500290] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Destaillats F, Angers P. On the mechanisms of cyclic and bicyclic fatty acid monomer formation in heated edible oils. EUR J LIPID SCI TECH 2005. [DOI: 10.1002/ejlt.200501159] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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van den Berg JDJ, Vermist ND, Carlyle L, Holcapek M, Boon JJ. Effects of traditional processing methods of linseed oil on the composition of its triacylglycerols. J Sep Sci 2004; 27:181-99. [PMID: 15334906 DOI: 10.1002/jssc.200301610] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Different oil processing methods were performed, which included washing with water and treatment with lead-based driers, with and without heating to different temperatures, giving a set of 7 oils to be investigated. The effects of the traditional processing methods of linseed oil on its triacylglycerol (TAG) composition were studied, using the following analytical methods: high performance size exclusion chromatography (HPSEC), Fourier transform infrared spectroscopy (FTIR), high-performance liquid chromatography-atmospheric pressure chemical ionisation-mass spectrometry (HPLC-APCI-MS), direct temperature resolved mass spectrometry (DTMS), matrix assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF-MS), and electrospray ionisation Fourier transform ion cyclotron resonance mass spectrometry (ESI-FTICR-MS). A decrease of the initial cis-double bonds and the formation of trans-double bonds upon heating of the oils was observed. Heating a lead and oil mixture to 150 degrees C, or heating the oil alone to 300 degrees C led to the highest degree of oxidation. A difference was observed for the oxidation patterns for oils with and without the addition of lead. Furthermore, levels of oxygen incorporation were higher when lead was added to the oil. High temperature treatment of the oils resulted in an increased average molecular weight. The changes in the initial conformation of the double bond systems observed with FTIR were supported by HPLC-APCI-MS measurements that showed the formation of a number of new isomeric TAGs in the heated oil compared to freshly pressed, untreated oil. Oligomerisation up to hexamers was observed with HPSEC, and MALDI-TOF-MS. The formation of oligomers up to trimers only, however, was observed with ESI-FTICR-MS. Incorporation of oxygen was mainly observed with MALDI-TOF-MS and ESI-FTICR-MS whereas with DTMS and FTIR hardly any evidence was found for this.
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Affiliation(s)
- Jorrit D J van den Berg
- FOM Institute for Atomic and Molecular Physics, Unit for Macromolecular Mass Spectrometry, Kruislaan 407, 1098 SJ, Amsterdam, The Netherlands.
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17
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Halket JM, Zaikin VV. Derivatization in mass spectrometry-3. Alkylation (arylation). EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2004; 10:1-19. [PMID: 15100474 DOI: 10.1255/ejms.619] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The review is devoted to alkylation (arylation) as a widely employed derivatization procedure for the protection of OH (carboxylic acids, phosphoric acids, sulfonic acids, alcohols, polyols, phenols, enols), SH (thiols) and NH (amines, amides) groups in order to increase volatility, to improve the chromatographic properties and, if possible, mass spectral properties of derivatives. Chemical aspects of derivatization and various alkylation (arylation) reagents and reaction procedures are described. Specific mass spectral (electron ionization, chemical ionization) features of derivatives helpful in identification, structure elucidation, profiling and quantitative determination of the above-mentioned polar compounds by coupled gas chromatography or high-performance liquid chromatography are discussed. Some common analytical applications of the procedures in organic chemistry, clinical chemistry, environmental chemistry etc. are briefly summarized.
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Affiliation(s)
- John M Halket
- Drug Control Centre, King's College London, Franklin-Wilkins Building, Stamford Street, London SE1 9NN, UK.
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18
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Lambelet P, Grandgirard A, Gregoire S, Juaneda P, Sebedio JL, Bertoli C. Formation of modified fatty acids and oxyphytosterols during refining of low erucic acid rapeseed oil. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2003; 51:4284-4290. [PMID: 12848499 DOI: 10.1021/jf030091u] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Formation of trans fatty acids and cyclic fatty acid monomers was investigated during refining of low erucic acid rapeseed oil. The first steps of the refining process, that is, degumming, neutralization, and bleaching, hardly modified the fatty acid profile. In contrast, deodorization produced substantial quantities of trans fatty acids (>5% of total fatty acids) and small amounts of cyclic fatty acid monomers (650 mg of cyclic fatty acid monomers/kg of oil) when severe conditions (5-6 h at 250 degrees C) were used. Alpha-linolenic acid was the main precursor of cyclic fatty acid monomers. The influence of deodorization on the chemical composition of low erucic acid rapeseed oil was studied additionally. Whereas free fatty acids, peroxides, and tocopherols decreased, neither total polar compounds nor oxyphytosterols changed during deodorization. Oxyphytosterols were identified by GC-MS. Three oxyphytosterols not yet observed in oil were tentatively identified as 6beta-hydroxycampestanol, 6beta-hydroxysitostanol, and 6beta-hydroxybrassicastanol. Brassicasterol oxides were the most abundant oxyphytosterols.
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Affiliation(s)
- Pierre Lambelet
- Nestlé Research Center, P.O. Box 44, 1000 Lausanne 26, Switzerland.
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19
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Identification of minor fatty acids in mussels (Mytilus galloprovincialis) by GC–MS of their 2-alkenyl-4,4-dimethyloxazoline derivatives. Anal Chim Acta 2002. [DOI: 10.1016/s0003-2670(02)00207-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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21
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Dobson G, Sebedio JL. Monocyclic dienoic fatty acids formed from γ-linolenic acid in heated evening primrose oil. Chem Phys Lipids 1999. [DOI: 10.1016/s0009-3084(98)00102-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Effect of fatty acid positional distribution and triacylglycerol composition on lipid by-products formation during heat treatment: III-Cyclic fatty acid monomers study. J AM OIL CHEM SOC 1998. [DOI: 10.1007/s11746-998-0318-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Abstract
Procedures for structural analysis of fatty acids are reviewed. The emphasis is on methods that involve gas chromatography-mass spectrometry and, in particular, the use of picolinyl ester and dimethyloxazoline derivatives. These should be considered as complementing each other, not simply as alternatives. However, additional derivatization procedures can be of value, including hydrogenation and deuteration, and preparation of dimethyl disulfide and 4-methyl-1,2,4-triazoline-3,5-dione adducts. Sometimes complex mixtures must be separated into simpler fractions prior to analysis by gas chromatography-mass spectrometry. Silver ion and reversed-phase high-performance liquid chromatography are then of special value. In particular, a novel application of the latter technique, involving a base-deactivated stationary phase and acetonitrile as mobile phase, is described that is suited to the separation of fatty acids in the form of picolinyl ester and dimethyloxazoline derivatives, as well as methyl esters.
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Affiliation(s)
- W W Christie
- Scottish Crop Research Institute, Invergowrie, Dundee, Scotland.
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24
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Dobson G. Identification of conjugated fatty acids by gas chromatography-mass spectrometry of 4-methyl-1,2,4-triazoline-3,5-dione adducts. J AM OIL CHEM SOC 1998. [DOI: 10.1007/s11746-998-0024-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Gary Dobson
- ; Scottish Crop Research Institute, Invergowrie; Dundee DD2 5DA Scotland, United Kingdom
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25
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Flickinger BD, McCusker RH, Perkins EG. The effects of cyclic fatty acid monomers on cultured porcine endothelial cells. Lipids 1997; 32:925-33. [PMID: 9307932 DOI: 10.1007/s11745-997-0119-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The popularity of polyunsaturated oils used in food applications and preparation continues to appreciate as a result of positive health claims. With polyunsaturated oils inherently more susceptible to oxidative and thermal degradation, the formation of new fatty acid species increases considerably. The presence of one species known as cyclic fatty acid monomers (CFAM) has been detected as a component of many oils subjected to various thermal processes including deep-fat frying. The effect of CFAM on metabolic processes has not been fully characterized. In this study, confluent porcine aortic endothelial cells incorporated CFAM into their polar and nonpolar lipid fractions following a 48-h exposure to 31 and 62 ppm CFAM in the culture medium. Subsequently, the influence of CFAM incorporation on various membrane-dependent physical properties and biochemical processes was investigated. CFAM decreased the lipid packing order of the membrane bilayer core but did not alter the lipid packing order of lipid chain segments at or near the lipid-water interface of the membrane. CFAM led to significant reductions in Ca2+ ATPase activity and monolayer integrity while eliciting a significant increase of prostacyclin synthesis and secretion.
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Affiliation(s)
- B D Flickinger
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign 61801, USA
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26
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27
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Sébédio JL, Juanéda P, Dobson G, Ramilison I, Martin JC, Chardigny JM, Christie WW. Metabolites of conjugated isomers of linoleic acid (CLA) in the rat. BIOCHIMICA ET BIOPHYSICA ACTA 1997; 1345:5-10. [PMID: 9084496 DOI: 10.1016/s0005-2760(97)00015-5] [Citation(s) in RCA: 135] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Metabolism of conjugated isomers of linoleic acid (CLA) in rats was studied by feeding high quantities of CLA (180 mg/day) for six days to animals that had been reared on a fat-free diet for two weeks. After this period, animals were sacrificed and liver lipids extracted. High-performance liquid chromatography (HPLC) analyses with UV detection revealed the presence of conjugated polyunsaturated fatty acids in the total liver lipid methyl esters. After isolation by HPLC, three fatty acid metabolites were identified by gas liquid chromatography coupled with mass spectrometry as being C20:3 delta 8,12,14, C20:4 delta 5,8,12,14 and C20:4 delta 5,8,11,13. A higher quantity of C20:4 delta 5,8,12,14 compared to C20:4 delta 5,8,11,13 was observed. These must arise from the elongation and desaturation of 18:2 delta 10,12 and 18:2 delta 9,11, respectively.
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Affiliation(s)
- J L Sébédio
- INRA, Unité de Nutrition Lipidique, Dijon, France
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28
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Jie MSFLK, Pasha MK, Syed-Rahmatullah MSK. Fatty acids, fatty acid analogues and their derivatives. Nat Prod Rep 1997. [DOI: 10.1039/np9971400163] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Mossoba MM, Yurawecz PM, Roach JAG, McDonald RE, Perkins EG. Confirmatory mass-spectral data for cyclic fatty acid monomers. J AM OIL CHEM SOC 1996. [DOI: 10.1007/bf02525462] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Dobson G, Christie WW, Sebedio JL. Monocyclic saturated fatty acids formed from oleic acid in heated sunflower oils. Chem Phys Lipids 1996. [DOI: 10.1016/0009-3084(96)02567-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Affiliation(s)
- Gary A. Eiceman
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003
| | - Herbert H. Hill
- Department of Chemistry, Washington State University, Pullman, Washington 99164
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Structural analysis of fatty acids by mass spectrometry of picolinyl esters and dimethyloxazoline derivatives. Trends Analyt Chem 1996. [DOI: 10.1016/0165-9936(95)00111-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Dobson G, Christie WW, Nikolova-Damyanova B. Silver ion chromatography of lipids and fatty acids. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL APPLICATIONS 1995; 671:197-222. [PMID: 8520692 DOI: 10.1016/0378-4347(95)00157-e] [Citation(s) in RCA: 175] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Silver ion chromatography as applied to the analysis of lipids is reviewed. Thin-layer, column, high-performance liquid and supercritical fluid chromatography in the silver ion mode are included. The lipid types covered are fatty acids, triacylglycerols and complex lipids. Separations are divided into those according to number, geometry and position of double bonds, as well as acyl positional isomers for triacylglycerols. The mechanism of silver ion chromatography is discussed in relation to recent studies using silver ion high-performance liquid chromatographic methodology.
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Affiliation(s)
- G Dobson
- Scottish Crop Research Institute, Invergowrie, Dundee, Scotland, UK
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