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LCGC North America-11-01-2001

LCGC North America

Striving to Validate Nutraceuticals

November 01, 2001

Validation Viewpoint

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

Marketplace

November 01, 2001

Inside

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Products, literature, application notes, etc.

What Drives a Separation — the Stationary Phase or the Mobile Phase?

November 01, 2001

Article

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

A Review of EPA Sample Preparation Techniques for Organic Compound Analysis of Liquid and Solid Samples

November 01, 2001

Sample Prep Perspectives

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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.

Retaining Polar Compounds

November 01, 2001

LC Troubleshooting

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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.

Handling Fast Peaks

November 01, 2001

GC Connections

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