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Fatty acids: VII. The gas-liquid chromatographic properties of all dimethylene interrupted methyl cis,cis-octadecadienoates

✍ Scribed by C.H. Lam; M.S.F. Lie Ken Jie


Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
621 KB
Volume
117
Category
Article
ISSN
1873-3778

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πŸ“œ SIMILAR VOLUMES


Chromatography of the isomeric methylene
✍ W.W. Christie πŸ“‚ Article πŸ“… 1968 πŸ› Elsevier Science 🌐 English βš– 545 KB

The equivalent chain lengths on gas-liquid chromatography of the isomeric methylene-interrupted methyl cis, cis-octadecadienoates (2,5-to 14,17-) 'were de: tcrmined on eight different liquid phases, two of which were in capillary columns.: The equivalent chain length values increased with distance

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Aff the dImethylene-inferrupied Fethyl octadecadiynoates have been synthesised and the gas-liquid chromatographic behaviour of these isomers was studied on polar [Carbowax 2OM, FFAP, DEGA, DEGS and War IOC (rcceniIy renamed as Apolw tOc)f, semi-poIar (XE-60) and non-p&x (SE-IO, OV-101 and Apiezon L)

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Eight isomeric methyl cis, cis-octadecadienoates (5,12; 6,12; 7,12; 6,11 ; 8,12; 6,10; 9,12; and 6,9) have been converted to dicyclopropane esters. The GLC behaviour, NMR spectra, and mass spectra of the dimethyleneoctadecanoates are discussed.

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The chromatographic properties of the cis and trans methyl octadecenoates and of some C12 and Cls acetylenic esters on thin layers of silica impregnated with silver nitrate and on some GLC systems are reported. The possibility of identification and separation of these isomers is discussed.