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The fatty acid composition of the oil of the winged bean ( Psophocarpus tetragonolobus L.) seeds
Author(s) -
Ekpenyong T. E.,
Borchers R. L.
Publication year - 1980
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02673105
Subject(s) - saponification value , iodine value , chemistry , linoleic acid , palmitic acid , composition (language) , food science , saponification , fatty acid , iodine , botany , chromatography , organic chemistry , biology , linguistics , philosophy
The seeds of the winged bean, Psophocarpus tetragonolobus L. were found to be rich in oil. The oil was examined for its iodine value, saponification value and fatty acid composition by gas liquid chromatography. The value (area percent) for fatty acids as methyl esters were: 14∶0 (0.2%); 16∶0 (9.1%); 16∶1 (0.4%); 18∶0 (5.4%); 18∶1 (41.0%); 18∶2 (29.5%); 18∶3 (1.9%); 20∶0 (2.0%); 20∶1 and 18∶4 together (2.2%); 22∶0 (7.3%) and 24∶0 (1.0%). The iodine value (Wij solution) was 91. The oil contains an appreciable amount of unsaturated fatty acids, especially linoleic 18∶2 (29.5%). The predominant saturated fatty acid is palmitic 16∶0 (9.1%).