کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1203020 965094 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Silica-based monolithic capillary columns—Effect of preparation temperature on separation efficiency
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Silica-based monolithic capillary columns—Effect of preparation temperature on separation efficiency
چکیده انگلیسی

The temperature effects during the sol–gel process and ageing of the silica-based monolith on the structure and separation efficiency of the capillary columns (100 μm i.d., 150 mm) for HPLC separations were studied. The tested columns were synthesized from a mixture of tetramethoxysilane, polyethylene glycol and urea under the acidic conditions. The temperature was varied from 40 °C to 44 °C and formation of bypass channels between the silica mold and the capillary wall was examined. The temperature of 43 °C was estimated as optimal for preparation of efficient silica capillary columns which were subsequently modified by octadecyldimethyl-N,N-diethylaminosilane or covered by poly(octadecyl methacrylate) and tested using standard mixture of alkylbenzenes under the isocratic conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1217, Issue 36, 3 September 2010, Pages 5737–5740
نویسندگان
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