Open AccessFree Energy Contribution to Gas Chromatographic Separation of Petroselinate and Oleate Esters
Author(s) -
Chanida Sansa-ard,
Kornkanok Aryusuk,
Supathra Lilitchan,
Kanit Krisnangkura
Publication year - 2010
Publication title -
chromatography research international
Language(s) - English
Resource type - Journals
eISSN - 2090-3510
pISSN - 2090-3502
DOI - 10.4061/2011/252543
Subject(s) - chemistry , alkyl , alcohol , chromatography , chromatographic separation , molecule , gas chromatography , organic chemistry , methyl oleate , double bond , stationary phase , high performance liquid chromatography , catalysis
The ease of separation by gas chromatography between petroselinic and oleic acids depends on the alcohol moieties of their esters. The esters of higher molecular weight alcohols tend to be better separated on a 90%-biscyanopropyl-10%-cyanopropylphenyl polysiloxane capillary column (30 m × 0.25 mm i.d.). By analysis of free energies contribution from different parts of the molecules, it is tentatively concluded that the interaction between the double bond and the column stationary phase is interfered by the bulky alkyl group, and it is the major driving force for the separation of the two fatty acids
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