کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1207489 | 1493715 | 2008 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improved efficiency in micellar liquid chromatography using triethylamine and 1-butanol as mobile phase additives to reduce surfactant adsorption
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
The effect of triethylamine as a mobile phase modifier on chromatographic efficiency in micellar liquid chromatography (MLC) is reported for nine different columns with various bonded stationary phases and silica pore sizes, including large-pore short alkyl chain, non-porous, and perfluorinated. Reduced plate height (h) versus reduced velocity (ν) plots were constructed for each column and the AⲠand CⲠterms calculated using a simplified Van Deemter equation introduced in our previous work. To further explore the practicality of using triethylamine in the micellar mobile phase, the efficiency of nine polar and non-polar substituted benzenes was studied on seven columns. Surfactant adsorption isotherms were measured for five columns with three micellar mobile phases to understand the relationship between adsorbed surfactant, mobile phase additive, and column efficiency. Clear improvements in efficiency were observed with the addition of 2% (v/v) triethylamine to a 1-butanol modified aqueous micellar mobile phase. This finding is supported by the lower amount of surfactant adsorbed onto the stationary phase when TEA is present in the mobile phase compared to an SDS only or a 1-butanol modified SDS mobile phase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1205, Issues 1â2, 26 September 2008, Pages 36-45
Journal: Journal of Chromatography A - Volume 1205, Issues 1â2, 26 September 2008, Pages 36-45
نویسندگان
David P. Thomas, Joe P. Foley,