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CORE-SHELL PHASES (PART 1 OF 2)
CORE-SHELL PHASES – HIGHEST EFFICIENCY FOR ALL HPLC INSTRUMENTS In the past years, manufacturers of HPLC columns and instruments have [...]
SPHERICAL SILICA: A WISE INVESTMENT IN FLASH CHROMATOGRAPHY
By Robert Cotta, Raymond Lombardi, and Robert R. Kerr, Ph.D. Introduction Flash chromatography is a well-established, efficient, and rapid [...]
STEVIA ANALYSIS (PART 1 OF 2)
HPLC separations of stevia ingredients The herbal sweetener stevia was allowed as a food additive in the EU in December [...]
FLASH CHROMATOGRAPHY – THE ROLE OF SILICA GEL
Flash chromatography works very well with silica gel. To understand why this is so it is important to consider the [...]
Chiral HPLC – 1 of 3
HPLC columns for the enantiomer separation Molecules, which are like mirror images, are called “chiral” (from the Greek word for [...]
Why can’t I reproduce my TLC separation using flash column chromatography?
Have you ever developed a TLC plate and noticed how great your separation looked, distinctly separated spots that you’d [...]