کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1206917 | 965249 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamic investigations on shape selective separation behaviors of poly(4-vinylpyridine)-grafted silica for polycyclic aromatic hydrocarbons in both normal-phase and reversed-phase high-performance liquid chromatography
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
With the successful implementation of poly(4-vinylpyridine)-grafted silica prepared by grafting-from approach (GF-VPn) as a stationary phase for the separation of polycyclic aromatic hydrocarbons (PAHs) in normal-phase HPLC, this paper describes the chromatographic retention behaviors of PAHs with GF-VPn in reversed-phase HPLC. Significantly higher retention factor along with enhanced shape selectivity were observed with GF-VPn. Thermodynamic study on the retention behaviors of PAHs with GF-VPn in normal-phase and reversed-phase HPLC revealed that retention of PAHs was exothermic in both phases. Furthermore, higher entropic contribution was observed in reversed-phase HPLC compared to normal-phase HPLC.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1216, Issue 16, 17 April 2009, Pages 3571–3577
Journal: Journal of Chromatography A - Volume 1216, Issue 16, 17 April 2009, Pages 3571–3577
نویسندگان
Usha Ghimire Gautam, Mani Prasad Gautam, Tsuyoshi Sawada, Makoto Takafuji, Hirotaka Ihara,