کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7608199 | 1493374 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Exploring the effect of mesopore size reduction on the column performance of silica-based open tubular capillary columns
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
The recipes were applied in 5â¯Î¼m i.d.-capillaries with a length of 60â¯cm. Efficiencies under retained conditions amounted up to Nâ¯=â¯137,000 for the PLOT column with a layer thickness (df) of 300â¯nm and to Nâ¯=â¯109,000 for the PLOT column with dfâ¯=â¯550â¯nm. Working under conditions of similar retention, the narrow pore/high SA columns produced with the new 80â¯Â°C recipe generated the same number of theoretical plates as the wide pore size/low SA columns produced with the 95â¯Â°C recipe. This shows the 80â¯Â°C-hydrothermal treatment process allows for an increase in the phase ratio of the PLOT columns without affecting their intrinsic mass transfer properties and separation kinetics. This is further corroborated by the fact that the plate height curves generated with the new and former recipe can both be well-fitted with the Golay-Aris equation without having to change the intra-layer diffusion coefficient.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1552, 1 June 2018, Pages 87-91
Journal: Journal of Chromatography A - Volume 1552, 1 June 2018, Pages 87-91
نویسندگان
Takeshi Hara, Shunta Futagami, Wim De Malsche, Gino V. Baron, Gert Desmet,