LCGC North America-04-01-2001

Second column of a two-part series in which Ron Majors examines trends in column introductions at Pittcon 2001. He describes GC and SFC columns, sample preparation products, and accessories.

GC Connections
LCGC North America

April 01, 2001

Hinshaw explains how combining certain column dimensions and electronic pneumatic settings can produce unexpected results.

Directions in Discovery
LCGC North America

April 01, 2001

Wehr examines developments discussed at "CE in the Pharmaceutical Industry," a symposium sponsored by the California Separation Science Society.

This article describes the determination of D/L-amino acid residues in peptides at microgram levels.

LC Troubleshooting
LCGC North America

April 01, 2001

The first of a two-part series about LC autosamplers.

Scored layers, sequential development, modifications of the development chamber, and a careful choice of standards produce better reliability in thin-layer chromatography analysis of urine for the diagnosis of mucopolysaccharidoses. In equivocal cases, repeating the procedure and varying the solvents will improve results.

Authors Chapman and Chen describe an enantiomer analysis method development strategy that uses a family of highly sulfated cyclodextrins to resolve a diverse array of compounds.

The authors determined the presence of 26 organophosphorus pesticides in apple and carrot samples using accelerated solvent extraction.