HYDROGENATION OF SOYBEAN OIL - A THIN-LAYER CHROMATOGRAPHY AND GAS-CHROMATOGRAPHY MATRIX-ISOLATION FOURIER-TRANSFORM INFRARED STUDY

被引:18
作者
MOSSOBA, MM [1 ]
MCDONALD, RE [1 ]
ARMSTRONG, DJ [1 ]
PAGE, SW [1 ]
机构
[1] US FDA,DIV FOOD CHEM & TECHNOL,SUMMIT ARGO,IL 60501
关键词
D O I
10.1021/jf00004a014
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
By use of gas chromatography/matrix isolation/Fourier transform infrared (GC/MI/FT-IR) spectroscopy, the double-bond configurations of fatty acid methyl esters (FAMEs) derived from hydrogenated soybean oil and margarine were determined from the positions of observed IR bands. However, because of the formation of complex FAME mixtures with overlapping GC peaks, preliminary separation was necessary. Mixtures of FAMEs were separated by silver nitrate thin-layer chromatography and GC using a polar cyanopropylpolysiloxane capillary column. GC eluates were trapped at 12 K under high vacuum in an argon matrix and subsequently analyzed by IR spectroscopy. Because of the high specificity of the MI/FT-IR technique, unique IR spectra were obtained that allowed the characterization of eight C18 diene FAME positional isomers with trans, trans or trans/cis configuration. C18 FAMEs with identical GC retention times were readily distinguished, and their degree of unsaturation and double-bond configuration were established by IR spectroscopy.
引用
收藏
页码:695 / 699
页数:5
相关论文
共 12 条
[1]  
ALLEN RR, 1987, HYDROGENATION, P1
[2]  
[Anonymous], 1984, OFFICIAL METHODS ANA
[3]  
BOURNE S, 1984, AM LAB, V16, P90
[4]  
EMKEN EA, 1979, GEOMETRICAL POSITION, P99
[5]   EFFECTS OF DIETARY TRANS-FATTY ACIDS ON REPRODUCTIVE-PERFORMANCE OF WISTAR RATS [J].
HANIS, T ;
ZIDEK, V ;
SACHOVA, J ;
KLIR, P ;
DEYL, Z .
BRITISH JOURNAL OF NUTRITION, 1989, 61 (03) :519-529
[6]   METABOLISM OF TRANS FATTY-ACIDS WITH EMPHASIS ON THE EFFECTS OF TRANS,TRANS-OCTADECADIENOATE ON LIPID-COMPOSITION, ESSENTIAL FATTY-ACID, AND PROSTAGLANDINS - AN OVERVIEW [J].
KINSELLA, JE ;
BRUCKNER, G ;
MAI, J ;
SHIMP, J .
AMERICAN JOURNAL OF CLINICAL NUTRITION, 1981, 34 (10) :2307-2318
[7]   GAS-LIQUID-CHROMATOGRAPHIC SEPARATION OF GEOMETRIC ISOMERS OF UNSATURATED FATTY-ACID METHYL-ESTERS USING A GLASS-CAPILLARY COLUMN [J].
KOBAYASHI, T .
JOURNAL OF CHROMATOGRAPHY, 1980, 194 (03) :404-409
[8]  
KUMMEROW FA, 1979, GEOMETRIC POSITIONAL, P174
[9]   COMPLEMENTARY TECHNIQUES FOR THE IDENTIFICATION OF TRANS, TRANS-18-2 ISOMERS IN MARGARINES [J].
MARCHAND, CM ;
BEAREROGERS, JL .
CANADIAN INSTITUTE OF FOOD SCIENCE AND TECHNOLOGY JOURNAL-JOURNAL DE L INSTITUT CANADIEN DE SCIENCE ET TECHNOLOGIE ALIMENTAIRES, 1982, 15 (01) :54-57
[10]   IDENTIFICATION OF TRANS-DIENE ISOMERS IN HYDROGENATED SOYBEAN OIL BY GAS-CHROMATOGRAPHY, SILVER-NITRATE THIN-LAYER CHROMATOGRAPHY, AND C-13 NMR-SPECTROSCOPY [J].
MCDONALD, RE ;
ARMSTRONG, DJ ;
KREISHMAN, GP .
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 1989, 37 (03) :637-642