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Langmuir Aggregation of Stain on Ionic Surfactant and its Application: Interaction of Bromo‐Pyrogallol Red with Cetyl Trimethylammonium Bromide (CTAB) and Determination of Molybdenum Traces
Author(s) -
Gao HongWen
Publication year - 2002
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200200006
Subject(s) - chemistry , bromide , adsorption , pulmonary surfactant , pyrogallol , langmuir , micelle , aggregation number , ammonium bromide , inorganic chemistry , monolayer , langmuir adsorption model , critical micelle concentration , nuclear chemistry , organic chemistry , aqueous solution , biochemistry
The microphase adsorption‐spectral correction (MPASC) technique was de scribed and applied to study the interaction of bromo‐pyrogallol red (BPR) with cetyl trimethylammonium bromide (CTAB). The synergism mechanism of micelles was analyzed and discussed. The large electrostatic micelle adsorbs the chromophore in only the monolayer, and the adsorption obeys the Langmuir adsorption. The formation of the (BPR 2 ·CTAB) 78 aggregate accelerates the Mo‐BPR complex reaction. Experimental results showed the adsorption constant of the adsorption aggregate 6.20 × 10 5 and its molar absorptivity ϵ r 610nm = 1.40 × 10 6 lmol −1 cm −1 . For analysis of samples, the recovery of Mo was between 97.4 and 107% and the RSD was less than 4.39%.