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Ultrahigh-Efficiency Protein Separations with Submicrometer Silica Using Slip Flow
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| By
Ronald E. Majors
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Professor Mary Wirth and graduate students Bingchuan Wei and Benjamin Rogers from Purdue University demonstrate a quantum leap in protein column efficiency. Using colloidal silica particles of submicrometer diameters (470 nm), they obtained plate heights that were as much as 15-fold lower than the theoretical limit for Hagen-Poiseuille flow.
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The Role of the Injection Solvent
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| By
John W. Dolan
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Bandar Alsehli
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A closer look at how the solvent chosen for injection can affect the appearance of chromatographic peaks.
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Solid-Phase Microextraction (SPME)
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| By
John Hinshaw
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SPME decouples sampling from matrix effects that would distort the apparent sample composition or disturb the chromatographic separation. It is also easy to use and reduces solvent consumption.
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Introduction to Preparative HPLC
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An overview of the principles and equipment required for scaling analytical separations to the preparative scale and considerations for the scale of analyte required.
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Market Profile: Dissolution Testing
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Dissolution testing is a mandatory test for the physical evaluation of solid dosage forms, such as capsules, tablets, ointments, and creams. The most basic form of testing measures the rate of dissolution or solubility of a drug tablet.
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