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      How does solvent choice impact reversed-phase flash chromatography separations?

      October 4, 2019 at 6:30 PM / by Bob Bickler posted in cartridge, chromatography, Developments, flash column, Flash Theory, gradient, isolera, Mass Detection, normal phase, reversed-phase gradient, selectivity, SNAP cartridge, solvent strength, solvents, terpene, terpenoid, User Tips

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      I have recently posted on how solvent choice influences the separation of hard to resolve compounds using normal-phase flash chromatography. As a chemist with an inquiring mind, I thought I would expand my research beyond normal-phase and see what happens in reversed-phase.

      In this post, I share my results. 

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      How do particle size and flow rate affect normal-phase flash column chromatography

      May 7, 2019 at 5:19 PM / by Bob Bickler posted in flash column, Flash column chromatography, loading capacity

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      Media particle size and solvent flow rate play major roles in chromatographic separations including flash purification.  This is true in both reversed-phase chromatography (aka partition chromatography) as well as normal-phase chromatography. The roles played are related to the overall compound mass-transfer kinetics and diffusion/dispersion as they migrate through the column.  Smaller particles reduce sample dilution by reducing interstitial volume, while flow rate impacts the ability of molecules to efficiently pass through the porous particles. In this post, I will show how both particle size and flow rate impact flash chromatography.

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