Production and Application of the Langmuir Aggregates of Eosine with Cetyl Trimethyl Ammonium Bromide

Author：        

Publisher： Springer Publishing Company

ISSN： 0021-9037

Source： Journal of Applied Spectroscopy, Vol.69, Iss.5, 2002-09, pp. : 667-674

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Abstract

The procedure of microphase adsorption–spectral correction is applied to the interaction of eosine Y (EO) to the micelles of cetyl trimethyl ammonium bromide (CTAB). The Langmuir aggregation of EO on CTAB occurs owing to microelectrostatic attraction. The results have shown that at pH 3.8, monomeric and micellar aggregates have the structure EO5·CTAB2 and (EO5·CTAB2)39. The adsorption constant of an aggregate is 7.01·105, its molar absorption coefficient is ɛ = 8.8·104 liters·mole-1·cm-1 at 550 nm. Application of the aggregation of EO on CTAB gives satisfactory results for quantitative determination of cation surface-active agents (surfactants).

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