Alkali isomerization—Gas chromatography with the microreactor apparatus
A simple and rapid method of simultaneously conjugating polyunsaturation and forming methyl esters from triglyceride oils, other esters and fatty acids has been developed by using the microreactor apparatus (MRA). These reactions occur while a mixture of tetramethylammonium hydroxide and sample of f...
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| Published in | Journal of the American Oil Chemists' Society Vol. 48; no. 10; pp. 633 - 635 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
Berlin/Heidelberg
Springer‐Verlag
01.10.1971
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| Online Access | Get full text |
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| Abstract | A simple and rapid method of simultaneously conjugating polyunsaturation and forming methyl esters from triglyceride oils, other esters and fatty acids has been developed by using the microreactor apparatus (MRA). These reactions occur while a mixture of tetramethylammonium hydroxide and sample of fat is being injected into a gas chromatograph from the MRA reaction chamber. The speed of this microanalysis is limited only by peak elution and peak integration times. Analyses of soybean oil and six partially hydrogenated fats have been compared with those previously obtained by the alkali isomerization spectrometric method. The amount of conjugation that occurs during the reaction is a measure of the linoleic acid in the oil. This procedure should prove useful for rapid microscale analysis of conjugatable dienes in a variety of samples, including edible fat products. |
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| AbstractList | Abstract
A simple and rapid method of simultaneously conjugating polyunsaturation and forming methyl esters from triglyceride oils, other esters and fatty acids has been developed by using the microreactor apparatus (MRA). These reactions occur while a mixture of tetramethylammonium hydroxide and sample of fat is being injected into a gas chromatograph from the MRA reaction chamber. The speed of this microanalysis is limited only by peak elution and peak integration times. Analyses of soybean oil and six partially hydrogenated fats have been compared with those previously obtained by the alkali isomerization spectrometric method. The amount of conjugation that occurs during the reaction is a measure of the linoleic acid in the oil. This procedure should prove useful for rapid microscale analysis of conjugatable dienes in a variety of samples, including edible fat products. A simple and rapid method of simultaneously conjugating polyunsaturation and forming methyl esters from triglyceride oils, other esters and fatty acids has been developed by using the microreactor apparatus (MRA). These reactions occur while a mixture of tetramethylammonium hydroxide and sample of fat is being injected into a gas chromatograph from the MRA reaction chamber. The speed of this microanalysis is limited only by peak elution and peak integration times. Analyses of soybean oil and six partially hydrogenated fats have been compared with those previously obtained by the alkali isomerization spectrometric method. The amount of conjugation that occurs during the reaction is a measure of the linoleic acid in the oil. This procedure should prove useful for rapid microscale analysis of conjugatable dienes in a variety of samples, including edible fat products. |
| Author | Lanser, Alan C. Bitner, E. D. Dutton, H. J. |
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| Cites_doi | 10.1021/ac60246a026 10.1007/BF02541221 10.1021/ac60204a013 10.1007/BF02645651 10.1016/S0022-2275(20)38929-X 10.1007/BF02531439 10.1007/BF02680035 10.1021/ac60242a004 |
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| Copyright | 1971 American Oil Chemists' Society (AOCS) |
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| Notes | Presented at the Fall ISF‐AOCS Meeting, Chicago, September 1970. No. Market. Nutr. Res. Div., ARS, USDA. |
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| References | 1967; 39 1963; 35 1967; 8 1969; 46 1966; 38 1952; 29 1967; 44 1959 1970; 5 1961; 38 e_1_2_1_7_1 Scholfield C.R. (e_1_2_1_11_1) 1961; 38 e_1_2_1_8_1 e_1_2_1_5_1 e_1_2_1_6_1 e_1_2_1_3_1 e_1_2_1_4_1 e_1_2_1_10_1 e_1_2_1_2_1 e_1_2_1_9_1 |
| References_xml | – volume: 38 start-page: 208 year: 1961 end-page: 211 publication-title: Ibid. – volume: 5 start-page: 707 year: 1970 end-page: 712 publication-title: Lipids – volume: 44 start-page: 648 year: 1967 end-page: 651 publication-title: JAOCS – volume: 35 start-page: 1588 year: 1963 end-page: 1591 publication-title: Anal. Chem. – volume: 38 start-page: 1302 year: 1966 end-page: 1305 publication-title: Anal. Chem. – volume: 39 start-page: 218 year: 1967 end-page: 221 publication-title: Anal. Chem. – volume: 8 start-page: 147 year: 1967 end-page: 149 publication-title: J. Lipid Res. – volume: 46 start-page: 113 year: 1969 end-page: 117 publication-title: JAOCS – start-page: 7 year: 1959 end-page: 58 – volume: 29 start-page: 229 year: 1952 end-page: 234 publication-title: JAOCS – ident: e_1_2_1_2_1 doi: 10.1021/ac60246a026 – ident: e_1_2_1_3_1 doi: 10.1007/BF02541221 – ident: e_1_2_1_6_1 doi: 10.1021/ac60204a013 – ident: e_1_2_1_10_1 doi: 10.1007/BF02645651 – ident: e_1_2_1_7_1 doi: 10.1016/S0022-2275(20)38929-X – ident: e_1_2_1_8_1 doi: 10.1007/BF02531439 – ident: e_1_2_1_4_1 – ident: e_1_2_1_5_1 doi: 10.1007/BF02680035 – ident: e_1_2_1_9_1 doi: 10.1021/ac60242a004 – volume: 38 start-page: 208 year: 1961 ident: e_1_2_1_11_1 publication-title: Ibid. contributor: fullname: Scholfield C.R. |
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| Title | Alkali isomerization—Gas chromatography with the microreactor apparatus |
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