A New Versatile and Sensitive Monitoring System for Liquid Chromatography: Cerate Oxidation and Fluorescence Measurement

Liquid chromatography of sugars on silica-based stationary phases

A review is given of sugar analysis by liquid chromatography using silica columns. Aspects covered are column materials and preparation, chemically and physically modified amine columns, octadecyl-and unmodified silica columns; eluent composition and elution mechanisms for the different types of columns used; detection methods, RI and UV detectors, visible light, fluorescence, moving-wire, polarimetric and mass detection; and sample preparation and origin of samples.

Comparative serum and urine analyses by dual-detector anion-exchange chromatography

A high-pressure anion-exchange chromatographic system has been modified to provide measurement of large numbers of molecular constituents in serum and for direct comparison to similar measurement in urine. Operating parameters have been adopted which greatly extend the range of elution for strongly retained anionic constituents and limit resolution of early-eluting basic and neutral compounds which were of less interest in this study. Dual monitoring by UV absorption and fluorescence produced by cerate oxidation provides both sensitive and wide-ranging detection capability. Comparative serum and urine chromatograms for a clinically normal subject, a subject after ingesting the drug 4-hydroxyacetanilide, and an infant suffering from extreme acidosis, illustrate the potential usefulness of this analysis in studying the origin, transport, in vivo reactions, and disposition of metabolites.