TY - JOUR
T1 - Characterization of micellar solutions using surfactant ion electrodes
AU - Kale, Kalidas M.
AU - Cussler, E. L.
AU - Evans, D. F.
PY - 1980
Y1 - 1980
N2 - Surfactant ion electrodes were used to investigate the dimerization, aggregation, and micelle formation occurring at 25 °C in aqueous solutions of sodium dodecyl sulfate, decyltrimethylammonium bromide, tetradecyltrimethylammonium bromide (TTAB), and orange II (4-[(2-hydroxy-l-naphthalenyl)azo]benzenesulfonic acid monosodium salt) as a function of added electrolyte. The surfactant electrodes, which contained a liquid membrane ion exchanger, permitted a direct determination of the surfactant monomer activity. Analysis of these data gave an association constant of 1000 for orange II, an estimated fractional charge on the DTAB micelle of 0.78, a dimerization constant of 400 (L/M) for TTAB, and a second break above the commonly accepted critical micelle concentration for sodium dodecyl sulfate, a break which may result from an ordering of the micelles.
AB - Surfactant ion electrodes were used to investigate the dimerization, aggregation, and micelle formation occurring at 25 °C in aqueous solutions of sodium dodecyl sulfate, decyltrimethylammonium bromide, tetradecyltrimethylammonium bromide (TTAB), and orange II (4-[(2-hydroxy-l-naphthalenyl)azo]benzenesulfonic acid monosodium salt) as a function of added electrolyte. The surfactant electrodes, which contained a liquid membrane ion exchanger, permitted a direct determination of the surfactant monomer activity. Analysis of these data gave an association constant of 1000 for orange II, an estimated fractional charge on the DTAB micelle of 0.78, a dimerization constant of 400 (L/M) for TTAB, and a second break above the commonly accepted critical micelle concentration for sodium dodecyl sulfate, a break which may result from an ordering of the micelles.
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U2 - 10.1021/j100443a007
DO - 10.1021/j100443a007
M3 - Article
AN - SCOPUS:33847085064
SN - 0022-3654
VL - 84
SP - 593
EP - 598
JO - The Journal of Physical Chemistry
JF - The Journal of Physical Chemistry
IS - 6
ER -