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Production and Application of the Langmuir Aggregates of Eosine with Cetyl Trimethyl Ammonium Bromide
Authors:H.‐W. Gao  M.‐L. Ye  J.‐Z. Ge  T.‐J. Wang
Affiliation:(1) College of Chemical Engineering, University of Technology of the Zhegiang Province, Hangzhou, 310014, China;(2) Pharmaceutical Company Zhezjang Konba, China;(3) Anhui University, China
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 epsi = 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 surfacedashactive agents (surfactants).
Keywords:procedure of microphase adsorption–  spectral correction  Langmuir isothermal adsorption  cetyl trimethyl ammonium bromide  eosine Y
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