Abstract
The microphase adsorption-spectral correction (MPASC) technique has been applied to the study of the interaction between cetyl trimethylammonium bromide (CTMAB) and the dye Bordeaux R (BR) at pH 9.6. The aggregation of BR on the CTMAB surface obeys the Langmuir adsorption isotherm. The aggregation of BR on CTMAB accelerates the complexation between Cu(II) and BR. Results at 25°C show that the adsorption constant of the CTMAB–BR 1:1 aggregate is 6.80 × 104. In the presence of CMTAB, the Cu–Br complex with a mole ratio of 2:1 has a cumulative stability constant of 1.08 × 1011. The cooperative adsorption and complexation have been applied successfully in a sensitive determination of trace amounts of copper.
Published Version
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