1955
DOI: 10.1021/ie50542a023
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Urea and Thiourea Complexes in Separating Organic Compounds

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Cited by 52 publications
(25 citation statements)
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“…Urea complexation is suited for the separation of linear from branched molecules. 34 Consequently, this technique can be used for the discrimination of straight-chain fatty acids (especially those longer than 14:0) from methyl-branched and unsaturated fatty acids in food. On the other hand, Ag + -HPLC can be used for the separation of unsaturated and saturated fatty acids.…”
Section: Resultsmentioning
confidence: 99%
“…Urea complexation is suited for the separation of linear from branched molecules. 34 Consequently, this technique can be used for the discrimination of straight-chain fatty acids (especially those longer than 14:0) from methyl-branched and unsaturated fatty acids in food. On the other hand, Ag + -HPLC can be used for the separation of unsaturated and saturated fatty acids.…”
Section: Resultsmentioning
confidence: 99%
“…The theory of UIC-based fractionation summarized herein is explained more thoroughly in other reviews (Hayes, 2002;Schlenk, 1954;Swern, 1955). Urea clathrates do not form unless guest molecules are present.…”
Section: Theory and Methodologymentioning
confidence: 91%
“…Taking advantage of UIC not oxidizing when exposed to air, storage of polyunsaturated fatty materials as UIC solids was explored. Finally, isolation of fatty peroxides and determining the configuration of diastereoisomers (for example, 9,10-dihydroxystearic acid) by formation of clathrates were also studied (Swern, 1955). More recently, urea fractionation was applied in laboratory-and industrial-scale reduction of saturated fatty acid content of low-erucic acid rapeseed oil (Hayes et al, 1998).…”
Section: Applicationsmentioning
confidence: 99%
“…chain components by urea adduct forma tion. 8 The needle-like crystals, upon de composition with water, extraction with petroleum ether, and gas-chromatographic analysis, were found to contain a mixture of straight chain methyl esters (black areas, Fig. 5B).…”
Section: Introduction and Discussionmentioning
confidence: 99%