P. Dzygiel et P. Wieczorek, Extraction of amino acids with emulsion liquid membranes using industrial surfactants and lecithin as stabilisers, J MEMBR SCI, 172(1-2), 2000, pp. 223-232
Industrial surfactants (being the mixtures of several individual compounds)
were used as stabilisers of emulsion liquid membranes (ELMs). Although, so
me impurities present in technical formulations of these compounds were ext
racted to aqueous solutions of amino acids, most of the used surfactants we
ll served to this purpose. In the case of amino acid transport, they do not
act as carriers and application of additional carrier (such as D2EHP) was
required in order to facilitate the transport. Interestingly, the same prop
erties were found for lecithin, industrially important natural surfactant.
Lecithin applied as a chiral discriminator, used either as an emulsion stab
iliser or carrier shows that this compound possesses insignificant enantios
elective properties. (C) 2000 Elsevier Science B.V. All rights reserved.