کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10266384 459022 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electromotive force studies about some dyes-cationic surfactants interactions in aqueous solutions
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electromotive force studies about some dyes-cationic surfactants interactions in aqueous solutions
چکیده انگلیسی
The interactions of Orange II and Direct Red 80, anionic azo dyes, and also Indigocarmine with n-dodecyltrimethylammonium bromide (DTAB) and hexadecyltrimethylammonium bromide (HTAB) in submicellar concentration ranges have been investigated by a potentiometric technique using DTAB and HTAB membrane selective electrodes. The detection limits for HTAB and DTAB electrodes are 8 × 10−7 and 5 × 10−7 mol dm−3, respectively. The data show that significant binding takes place and the critical concentrations associated with the saturation of the dyes with bound surfactant have been determined. It has also been shown that free micelles occur in solution before the dyes become fully saturated with bound surfactant. The results also show that under the same experimental conditions the complex formation between HTAB and Orange II takes place at more less surfactant concentration than between DTAB and Orange II. EMF data and comparison between calibration and binding curves showed that interaction between HTAB and Orange II is more than that between Direct Red 80 and Indigocarmine.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 65, Issue 2, May 2005, Pages 117-123
نویسندگان
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