From the category archives:

Monoliths

Four directions how to improve monolithic stationary phases

April 1, 2010

Georges Guiochon pointed out in his excelent reivew about monolithic stationary phases four directions from which we can expect a serious improvement in (monolithic) columns performance.
High temperature chromatography
High temperature chromatography, which causes a reduction in the viscosity of the mobile phase. So far, monolithic stationary phases have not yet been used at high temperatures but [...]

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History of monolithic stationary phases

March 23, 2010

Although the monolithic stationary phases suitable for separations were introduced in the 1990s [1,2,3], the idea of using a “continuous block of the porous gel structure” as stationary phase was discussed in Analyst by R. L. M. Synge, A. J. P. Martin, and A. Tiselius as longs ago as in 1952.
Both equilibrium and kinetic aspects [...]

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Separation of small molecules on organic polymer monoliths

February 8, 2010

Because of lack of small pores it is difficult to separate small molecules with polymer monoliths in isocratic mode. We have prepared monolithic capillary columns and then hypercrosslinked them to afford a monolith containing an array of small pores [1].

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Control of porous properties in organic polymer monoliths

October 20, 2009

Many applications of porous materials in areas such as catalysis, adsorption, ion exchange, chromatography, and solid phase synthesis rely on the intimate contact with a surface that supports the active sites.

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Pore formation in organic polymer monoliths

October 19, 2009

The generally accepted mechanism of pore formation in organic polymer monolihts during a typical polymerization in the presence of a precipitant is following [1,2]:

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Monolithic stationary phases

October 18, 2009

As a new type of chromatographic stationary phase, monoliths have been subjected to intensive study in the last years. They differ from other supports mainly in their characteristic structure, which results in the improved chromatographic properties.

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