Direct method for regiospecific analysis of TAG using [alpha]-MAG
An analytical procedure was developed for regiodistribution analysis of TAG using [alpha]-MAG prepared by an ethyl magnesium bromide deacylation. In the present communication, the deacylation procedure is shown to lead to representative [alpha]-MAG, allowing the composition of the native TAG in the a-position to be determined directly. The composition in the [bêta]-position can then be estimated from the composition of the [alpha]-MAG and TAG according to the formula 3 x TAG - 2 x [alpha]-MAG. The estimates are superior to those obtained using the [alpha],[bêta]-DAG and Brockerhoff calculations as they come closer to the theoretical value and have smaller SID. The present procedure, first demonstrated on a synthetic TAG, was then successfully applied to the analysis of borage oil, milkfat, and tuna oil.
Main Authors: | Turon, Fabrice, Bachain, Philippe, Caro, Yanis, Pina, Michel, Graille, Jean |
---|---|
Format: | article biblioteca |
Language: | eng |
Subjects: | Q04 - Composition des produits alimentaires, U30 - Méthodes de recherche, composition chimique, corps gras, acylation, technique analytique, triglycéride, http://aims.fao.org/aos/agrovoc/c_1794, http://aims.fao.org/aos/agrovoc/c_2816, http://aims.fao.org/aos/agrovoc/c_28220, http://aims.fao.org/aos/agrovoc/c_1513, http://aims.fao.org/aos/agrovoc/c_14992, |
Online Access: | http://agritrop.cirad.fr/515364/ http://agritrop.cirad.fr/515364/1/515364.pdf |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Acyl migration incidence on accuracy of a triacylglycerol regioanalysis - a theoretical evaluation
by: Turon, Fabrice, et al. -
Répartition interne/externe des acides gras des triglycérides de quelques huiles gamma linoléniques
by: Muderhwa, J.M., et al. -
Comment suivre les modifications de la position interne des triglycérides sériques humaines ?
by: Pina, Michel, et al. -
Stability to oxidation and interfacial behavior at the air/water interface of minimally-processed versus processed walnut oil-bodies
by: Kergomard, Jeanne, et al. -
Enzymatic synthesis of N- epsilon -acyllysines
by: Montet, Didier, et al.