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TLC is More Than Normal Phase by Robert Cotta
Rethinking TLC Plates: More Than Normal Phase Thin-layer chromatography (TLC) is one of the most common tools in chemistry [...]
Sorbtech Silica Gel Comparisons by Robert Cotta
Background When examining silica gel comparisons, several key chromatographic parameters should always be considered. These include the retention [...]
CHIRAL GC (PART 2 OF 2)
Choosing Chiral GC Phases In the following section, we provide guidance on selecting chiral GC phases. To do this, [...]
CORE-SHELL PHASES (PART 1 OF 2)
Core-Shell Phases : Maximum Efficiency for All HPLC Systems Over the past several years, manufacturers of HPLC columns and [...]
SPHERICAL SILICA GEL: INVESTING IN FLASH
By Robert Cotta, Raymond Lombardi, and Robert R. Kerr, Ph.D. The use of spherical silica gel in flash chromatography is [...]
STEVIA ANALYSIS (PART 1 OF 2)
HPLC Separations of Stevia Ingredients Stevia, the herbal sweetener, gained approval as a food additive in the EU in [...]
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 [...]