All News

Products and literature for separation science.

Craig Young and John Dolan provide tips and techniques for evaporative light-scattering detection.

The authors describe a fast, simple procedure for purifying mobile phase that uses SPE disks during the filtration step.

"Milestones in Chromatography" discusses the beginnings of gas chromatography in the UK and the first two international symposia that played an important role in the dissemination of the technique.

Events for November 2003...

This article describes a study that assesses the ability of commercially available GC–MS methods to meet project criteria for MTBE in groundwater matrices.

Leslie Ettre discusses peak asymmetry calculation.

Ron Majors looks at practical ways to return a contaminated column to its original state.

The authors describe a GC assay of trihalomethanes in drinking water.

John Hinshaw looks into a carrier-gas leak and its effects on the chromatographic baseline.

This article presents a volatile ion-pairing reagent that enables good retention of highly polar anionic species using reversed-phase LC–MS.

Corporate profile for Polymicro Technologies, LLC. For more information see the company's web site at www.polymicro.com.

Corporate profile for Isco, Inc. For more information see the company's web site at www.isco.com.

Corporate profile for Grace Vydac. For more information see the company's web site at www.gracevydac.com.

Leslie Ettre looks at the birth and early development of headspace analysis.

2002 author–subject index.

In the second part of a three-part series, the guest author discusses selecting buffers for use in partially aqueous mobile phases.

Products for separation science.

Guest authors Lloyd Snyder and John Dolan describe a method for determining reversed-phase column selectivity.

John Hinshaw updates his glossary of GC terms and techniques.

The author determines the uncertainty in the quantification of four rat liver samples by applying a statistical evaluation.

The guest authors present a strategy for validating a capillary isoelectric focusing method intended to quantitate impurities in a protein drug substance.

Guest author G. William Tindall discusses pH measurements in aqueous solutions and the changes that occur when organic solvent is added.

Guest author Steve Griffin identifies the fundamental problems in capillary manufacturing techniques that cause capillary defects and suggests some corrective actions.

John Hinshaw discusses the measurement of column flow and its interrelationship with carrier-gas velocity.

Leslie Ettre remembers A.J.P. Martin, inventor of partition, paper, reversed-phase, and gas–liquid partition chromatography.

This article provides theoretical background, experimental data, and practical considerations about the effects of organic modifiers on analyte ionization in reversed-phase LC.

John Dolan examines problems associated with adjusting gradients in reversed-phase LC.