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Neff WE, Jackson MA, List GR, King JW. Qualitative and Quantitative Determination of Methyl Esters, Free Fatty Acids, Mono-, Di-, and Triacylglycerols Via HPLC Coupled with a Flame Ionization Detector. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079708010960] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- W. E. Neff
- a USDA, Agricultural Research Service, National Center for Agricultural Utilization Research Food Quality and Safety Research , 1815 N. University Street, Peoria, Illinois, 61604, USA
| | - M. A. Jackson
- a USDA, Agricultural Research Service, National Center for Agricultural Utilization Research Food Quality and Safety Research , 1815 N. University Street, Peoria, Illinois, 61604, USA
| | - G. R. List
- a USDA, Agricultural Research Service, National Center for Agricultural Utilization Research Food Quality and Safety Research , 1815 N. University Street, Peoria, Illinois, 61604, USA
| | - J. W. King
- a USDA, Agricultural Research Service, National Center for Agricultural Utilization Research Food Quality and Safety Research , 1815 N. University Street, Peoria, Illinois, 61604, USA
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Byrdwell WC, Neff WE, List GR. Triacylglycerol analysis of potential margarine base stocks by high-performance liquid chromatography with atmospheric pressure chemical ionization mass spectrometry and flame ionization detection. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2001; 49:446-457. [PMID: 11170612 DOI: 10.1021/jf0008801] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Several margarine base stock candidates have previously been prepared for the purpose of finding better, more oxidatively stable food components: high-saturate vegetable oils, randomized vegetable oils, vegetable oil-hard stock blends, and interesterified vegetable oil-hard stock blends. Here are reported the triacylglycerol compositions of these products, determined using reverse-phase high-performance liquid chromatography (HPLC) coupled with a flame ionization detector or a quadrupole mass spectrometer with an atmospheric pressure chemical ionization source. Triacylglycerol percent composition results for samples of known composition (randomized and interesterified samples) exhibited less average error by HPLC coupled with a quadrupole mass spectrometer with an atmospheric pressure chemical ionization source, after application of response factors, than the results by HPLC coupled with a flame ionization detector. The fatty acid compositions calculated from the mass spectrometric data exhibited less average error than the fatty acid compositions resulting from the flame ionization detector data. The average error of the fatty acid compositions by the mass spectrometer was lowest for interesterified blend samples, next lowest for randomized samples, then followed by high-saturated fatty acid oils, normal oils, and blends. Analysis of the vegetable oil-hard stock blends by mass spectrometer required special treatment for calculation of response factors.
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Affiliation(s)
- W C Byrdwell
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, USA
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Neff WE, Byrdwell WC. Soybean oil triacylglycerol analysis by reversed-phase high-performance liquid chromatography coupled with atmospheric pressure chemical ionization mass spectrometry. J AM OIL CHEM SOC 1995. [DOI: 10.1007/bf02540986] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- W. E. Neff
- Food Quality and Safety Research; NCAUR, ARS, USDA; Peoria Illinois 61604
| | - W. C. Byrdwell
- Food Quality and Safety Research; NCAUR, ARS, USDA; Peoria Illinois 61604
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Adlof RO, Copes LC, Emken EA. Analysis of the monoenoic fatty acid distribution in hydrogenated vegetable oils by silver-ion high-performance liquid chromatography. J AM OIL CHEM SOC 1995. [DOI: 10.1007/bf02638858] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- R. O. Adlof
- ; USDA, ARS, NCAUR, Food Quality and Safety Research; Peoria Illinois 61604
- ; USDA, ARS, NCAUR; 1815 N. University St. Peoria IL 61604
| | - L. C. Copes
- ; USDA, ARS, NCAUR, Food Quality and Safety Research; Peoria Illinois 61604
| | - E. A. Emken
- ; USDA, ARS, NCAUR, Food Quality and Safety Research; Peoria Illinois 61604
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Oxidative stability of blends and interesterified blends of soybean oil and palm olein. J AM OIL CHEM SOC 1994. [DOI: 10.1007/bf02675904] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Neff WE, Adlof RO, Konishi H, Weisleder D. High-performance liquid chromatography of the triacylglycerols ofVernonia galamensis andCrepis alpina seed oils. J AM OIL CHEM SOC 1993. [DOI: 10.1007/bf02542574] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Neff WE, Selke E, Mounts TL, Rinsch W, Frankel EN, Zeitoun MAM. Effect of triacylglycerol composition and structures on oxidative stability of oils from selected soybean germplasm. J AM OIL CHEM SOC 1992. [DOI: 10.1007/bf02540559] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Neff W, Zeitoun M, Weisleder D. Resolution of lipolysis mixtures from soybean oil by a solid-phase extraction procedure. J Chromatogr A 1992. [DOI: 10.1016/0021-9673(92)80045-v] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zeitoun MAM, Neff WE, Selke E, Mounts TL. Analyses of Vegetable Oil Triglyceride Molecular Species by Reversed Phase High Performance Liquid Chromatography. ACTA ACUST UNITED AC 1991. [DOI: 10.1080/01483919108049348] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Measurement of the metabolic interconversion of deuterium-labeled fatty acids by gas chromatography/mass spectrometry. Lipids 1990; 25:401-5. [PMID: 2395419 DOI: 10.1007/bf02537984] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An analytical method that was developed to analyze deuterium-labeled fatty acids in human blood has been extended to identify labeled fatty acids from C14 to C24 chain length which are formed by metabolic processes such as desaturation, elongation, or shortening of the labeled fatty acids fed. A new computer and a hardware adder have been utilized to assure reliable data acquisition. Relative standard deviations for the analysis of labeled fatty acids were measured at 0.02, 0.03, and 0.04 at the 5%, 1%, and 0.2% levels of the labeled fatty acid methyl esters, respectively. The method makes extensive use of standards and computer processing for accuracy and high productivity. Data from a chylomicron triacylglycerol fraction are included to demonstrate the sensitivity of detection of metabolites formed by desaturation and elongation.
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Awl RA, Frankel EN, Brooks DD, Weisleder D. Cyclic fatty esters: synthesis, characterization, and lipolysis of isomeric triglycerides of 9-(6-propyl-3-cyclohexenyl)-(Z)8-nonenoic acid. Chem Phys Lipids 1986; 41:65-80. [PMID: 3757149 DOI: 10.1016/0009-3084(86)90125-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Triglycerides of a model cyclic fatty acid (CFA) 9-(6-propyl-3-cyclohexenyl)-(Z)8-nonenoic acid (Ia) were synthesized for biological and toxicity evaluations. The monoacid triglyceride II (CyCyCy) was interesterified with triolein (OOO) to obtain mixtures of diacid triglycerides: III (OOCy), IV (OCyO), V (OCyCy), and VI (CyOCy). The interesterification mixtures were separated by preparative HPLC into two 'critical pairs' of isomeric triglycerides. Triglycerides III-VI were synthesized and a 13C-NMR method was developed to estimate 'critical pairs'. CFA-triglycerides were characterized by IR, NMR, HPLC and capillary GLC, and their relative rates of hydrolysis by lipase were compared. Although tricyclin (II) was completely resistant to lipolysis, triglycerides III and VI hydrolyzed significantly slower than triolein, and the 'critical pairs' hydrolyzed as readily as triolein. Therefore, partial CFA-triglycerides formed in heat-abused fats can undergo lipolysis and likely be absorbed like normal dietary fats.
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Paulis J, Bietz J. Separation of alcohol-soluble maize proteins by reversed-phase high performance liquid chromatography. J Cereal Sci 1986. [DOI: 10.1016/s0733-5210(86)80022-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Bitner ED, Friedrich JP, Mounts TL. Laboratory continuous deodorizer for vegetable oils. J AM OIL CHEM SOC 1986. [DOI: 10.1007/bf02546042] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Quantitation of estolide triglycerides in sapium seeds by high performance liquid chromatography with infrared detection. J AM OIL CHEM SOC 1983. [DOI: 10.1007/bf02660218] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Rakoff H, Emken EA. Synthesis and properties of methyl 9,12,15-octadecatrienoate geometric isomers. Chem Phys Lipids 1982. [DOI: 10.1016/0009-3084(82)90057-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bell EW, Emken EA, Klevay LM, Sandstead HH. Effects of dietary fiber from wheat, corn, and soy hull bran on excretion of fecal bile acids in humans. Am J Clin Nutr 1981; 34:1071-6. [PMID: 6263074 DOI: 10.1093/ajcn/34.6.1071] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Effects of dietary fiber on bile acid excretion and fecal bile acid concentration have been studied for seven subjects fed 26 g of either soft white wheat bran, corn bran, soybean hulls, or hard red spring wheat bran. Results indicate that even in a controlled study using a metabolic word, individual subject variation has a major impact on fecal bile acid excretion. This observation has not been fully appreciated in previous human studies. No significant change in the composition of fecal bile acids could be associated with the decrease in serum lipid levels previously reported. A method for the isolation and quantitation of fecal bile acids is described which does not require purification by thin-layer chromatography. A preliminary study of lyophilized fecal samples stored at -10 to -30 degrees C showed very little or no change in bile acid content. Samples stored at room temperatures for 11 months showed a substantial reduction in bile acid content.
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Gugliemelli LA, Dutton HJ, Jursinic PA, Segelman HW. ENERGY TRANSFER IN A LIGHT-HARVESTING CAROTENOID-CHLOROPHYLL c-CHLOROPHYLL a-PROTEIN OF PHAEODACTYLUM TRICORNUTUM. Photochem Photobiol 1981. [DOI: 10.1111/j.1751-1097.1981.tb05510.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Scholfield CR. Gas chromatographic equivalent chain lengths of fatty acid methyl esters on a silar 10C glass capillary column. J AM OIL CHEM SOC 1981. [DOI: 10.1007/bf02899443] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- C. R. Scholfield
- Agricultural Research, Science and Education Administration, U.S. Department of Agriculture; Northern Regional Research Center; 61604 Peoria IL
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Payne-Wahl K, Spencer GF, Plattner RD, Butterfield RO. High-performance liquid chromatographic method for quantitation of free acids, mono-, di- and triglycerides using an infrared detector. J Chromatogr A 1981. [DOI: 10.1016/s0021-9673(00)80423-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Neff WE, Frankel EN. Quantitative analyses of hydroxystearate isomers from hydroperoxides by high pressure liquid chromatography of autoxidized and photosensitized-oxidized fatty esters. Lipids 1980. [DOI: 10.1007/bf02534183] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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