LCGC North America-11-01-2001

Guest authors Thompson and Morris summarize the problems and progress in establishing regulated analytical methods for dietary supplements.

Products, literature, application notes, etc.

The author investigates solute partitioning between the mobile and stationary phases to determine the driving force of reversed-phase liquid chromatography separations.

Guest author Greg LeBlanc reviews techniques for preparing non- and semivolatile compounds from environmental samples for analysis under the Environmental Protection Agency's SW-846 guidelines.

Dolan examines some options for increasing the retention of polar compounds, which is a goal when using gradient elution scouting runs to screen the retention characteristics of compounds for separation by reversed-phase liquid chromatography.

Hinshaw examines the effects of system time constants and sampling rates upon apparent peak shapes and areas when performing fast gas chromatography.