Temperature effects on retention and efficiency of butyl and lauryl acrylate porous polymer monoliths in capillary electrochromatography.
作者： Charlisa R. Daniels , Brent L. Waguespack , Slade A. Hodges , Michelle M. Bushey
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摘要: The development of organic porous polymer monoliths represents an alternative approach to stationary phase design. use these materials has helped rekindle interest in capillary electrochromatography. Although a large number investigations have explored different monolith recipes, polymerization conditions, and application challenges, few addressed the fundamentals this separation mode with type material. This study addresses thermodynamics reversed retention mechanism on 100% butyl acrylate 1:3 butyl:lauryl (volume/volume ratio) used electrochromatography mode. Linear van't Hoff plots yield enthalpies -3.9 -14.3 kJ/mol two different, but related columns for five selected hydrophobic analytes across thirty degree temperature range. Minimum plate heights were only moderately impacted over
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