Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1060, Issue 1-2, Pages 187-193Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2004.08.113
Keywords
temperature effects; Van't Hoff plot; silica; retention behavior
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The use of unbonded silica as a stationary phase in reversed-phase HPLC is described as a useful alternative to bonded phase columns for polar, lipophilic amines. Using four lipophilic amines, the role of temperature is shown to favorably impact both efficiency and selectivity, which is not universally seen when using bonded phases. As temperature is raised, retention drops on the silica column. The temperature behavior appears to support the hypothesis that retention is dependant upon electrostatic and adsorptive forces. (C) 2004 Elsevier B.V. All rights reserved.
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