Wh. Wang et al., REVERSE MICELLAR EXTRACTION OF AMINO-ACIDS USING DIOCTYLDIMETHYLAMMONIUM CHLORIDE, Industrial & engineering chemistry research, 34(2), 1995, pp. 599-606
The effects of pH, ionic strength,and amino acid and surfactant concen
trations on the reverse micellar extraction of aspartic acid, glutamic
acid, and threonine using dioctyldimethylammonium chloride (DODMAC),
were determined. The concentrations of the ionic species in the aqueou
s phase were measured, and the corresponding concentrations inside the
reverse micelles were obtained by material balances and the condition
of electrical neutrality. The results show that the amino acids were
mainly extracted through an ion exchange mechanism. The net charge of
an amino acid, the competition among anions, the dissociation equilibr
ium of DODMAC, and the water uptake in the reverse micelles are import
ant factors which dominate the amino acid extraction.