A rapid method for the estimation of trans  unsaturation in hydrogenated oils and fats | Zendy

Sreenivasan B. | Zendy; Holla K. S. | Zendy

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A rapid method for the estimation of trans unsaturation in hydrogenated oils and fats

Author(s) -

Sreenivasan B.,

Holla K. S.

Publication year - 1967

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/bf02635623

Subject(s) - degree of unsaturation , glyceride , methyl oleate , molar absorptivity , chemistry , long chain , carbon number , organic chemistry , fatty acid , catalysis , physics , polymer science , optics , alkyl

Glycerides and methyl esters of fatty acids containing trans unsaturation both show peaks at 10,38 Ɓ. The absorptivities of the glycerides (a 10.38 Ɓ) have a straight line relationship with the concentration of the trans unsaturation, calculated as methyl elaidate. This relationship has been utilized as a quick method for estimating the trans unsaturation in hydrogenated fats such as Vanaspati. The infrared spectrum of a given hydrogenated fat is taken in the region of 9‐11 Ɓ, the absorptivity at the trans ‐peak is calculated, and the corresponding methyl elaidate content is read from a graph.

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