Monolithic columns in liquid phase separations
نویسندگان
چکیده
منابع مشابه
Microscale liquid phase separations.
Miniaturization and microfabrication of analytical instrumentation for chemical and biological analyses has been proceeding at a rapid pace for a few decades, and has gained momentum in the past decade with the introduction and application of microfabricated instruments. Motivating factors for performing microscale separations and analyses are reduced reagent, solvent and sample consumption, re...
متن کاملMonolithic LC columns.
Recently, monolithic columns consisting of one piece of an organic polymer or silica with flow-through pores have been reported in the literature. These materials provide better stability and, more important, higher performance than conventional columns packed with particles. Although they can be prepared by various methods, monolithic columns prepared by the direct polymerization of monomers c...
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The performance of isocratic separations of 11 pollutant phenols (PP) using monolithic (Chromolith RP-18e) and conventional reversed-phase 5 microm (Luna and Purospher C18) and 4 microm (Synergi C12) particulate size columns, selected from high purity silica materials, has been compared. The separations have been optimized based on a previously optimized separation in which a reversed-phase C18...
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The flashing feed sections of crude oil vacuum towers are especially prone to liquid entrainment. This can be detrimental to the performance of the packings/trays above the feed. It is also of disadvantage in case liquid is collected and recirculated back to the furnace. Therefore it is common practice to use special inlet devices that help preventing or minimizing liquid entrainment while maxi...
متن کاملMonolithic columns with mixed modes of reversed-phase and anion-exchange stationary phase for capillary electrochromatography.
A capillary electrochromatography (CEC) monolithic column with mixed modes of reversed-phase and anion-exchange stationary phases was prepared by in situ polymerization of 2-(methacryloxy)ethyltrimethylammonium methyl sulfate (MEAMS) and ethylene dimethacrylate (EDMA) in a binary porogenic solvent consisting 1-propanol and 1,4-butanediol. The ammonium groups on the surface of the stationary pha...
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ژورنال
عنوان ژورنال: Analytical and Bioanalytical Chemistry
سال: 2013
ISSN: 1618-2642,1618-2650
DOI: 10.1007/s00216-012-6694-z