Journal
INSTRUMENTATION SCIENCE & TECHNOLOGY
Volume 32, Issue 3, Pages 271-280Publisher
MARCEL DEKKER INC
DOI: 10.1081/CI-120030539
Keywords
Langmuir aggregation; coomassie brilliant blue G250; cetyltrimethylammonium bromide; determination of cationic surfactant
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The interaction of Coomassie brilliant blue G250 (CBBG) with cetyltrimethylammonium bromide (CTAB) has been investigated at pH 9.50 by the microsurface binding-spectral correction (MSASC) technique. The experiments confirmed that the aggregation of CBBG on CTAB obeys the Langmuir isothermal adsorption. The aggregate was characterized. Results showed that the monomer aggregate, CBBG(2)CTAB was formed at 30degreesC with a binding constant of 6.46 x 10(3). The aggregation was applied to the quantitative determination of the cationic surfactant in water samples with satisfactory results.
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