Classification of Octadecyl-Bonded Liquid Chromatography Columns

Microfabricated pillar array columns for liquid chromatography

Determination of inorganic anions by capillary ion-exchange chromatography using polyethylenimine-coated octadecyl-bonded phases.

The utility of a cationic polymer polyethylenimines (PEI) for coating some commercially available silica-based stationary phases packed in capillaries of 0.32 mm i.d. and 10 cm long was studied for the separation and direct UV detection of inorganic anions (iodate, bromate, nitrite, bromide, and nitrate ions). With a super-endcapped octadecylated silica stationary phase, which yielded the best...

Recent advances in high-performance liquid affinity chromatography columns.

High-performance liquid affinity chromatography (h.p.1.a.c.) is the term applied to the application of h.p.1.c. to affinity chromatography (Ohlson et al., 1978). Until recently affinity chromatography supports were unsuitable for use in high-performace applications. It is only in the last 8 years that these problems have been overcome, resulting in a second generation of affinity systems. The a...

3D printed metal columns for capillary liquid chromatography.

Coiled planar capillary chromatography columns (0.9 mm I.D. × 60 cm L) were 3D printed in stainless steel (316L), and titanium (Ti-6Al-4V) alloys (external dimensions of ~5 × 30 × 58 mm), and either slurry packed with various sized reversed-phase octadecylsilica particles, or filled with an in situ prepared methacrylate based monolith. Coiled printed columns were coupled directly with 30 × 30 m...

Silver ion chromatography using solid-phase extraction columns packed with a bonded-sulfonic acid phase.

Commercial solid-phase extraction columns packed with a stationary phase with bonded benzenesulfonic acid groups are readily converted to the silver ion form and can then be used for silver ion chromatography of lipids. To illustrate the utility of such procedures, methyl ester derivatives of fatty acids with zero to six double bonds were separated from each other by a simple stepwise elution s...