Gas Chromatography (GC)

In this first of a two-part series, John Hinshaw discusses the relative effects that inlet pressures and oven temperatures have on capillary gas chromatography.

This column focuses on some of the latest developments in preparative-scale columns, bulk packing materials and column hardware designs. Silica, polymeric and other packings are discussed together with the newest monolithic columns.

This instalment of GC Connections examines the basics of peak identification and quantification and demonstrates how they can both influence the quality of one's results as much as or even more than sample preparation, separation and detection.

Maltodextrin is an easily digested carbohydrate made from corn starch...

VENTURE A affinity columns utilize ICEtechTM surface passivation technology...

Mini application note summaries...

Polymeric monolithic stationary phases offer an alternative to the classical microparticulate sorbents...

In response to a reader's question, John Hinshaw examines the effects on retention times and peak shapes when a retention gap is added to a capillary column.

This article is an adaptation of one written in the German publication Nachrichten aus der Chemie and discusses how gas chromatography instrumentation, columns and techniques have improved over the past 10–15 years, making even relatively new equipment obsolete for many applications. In particular, the authors look at how older equipment is unsuitable for fast GC, better trace analysis and comprehensive multidimensional GC.

A report on the meeting that took place in April this year in York.

The effects of adding a precolumn - or retention gap - to a capillary column are explored.

The authors discuss how the materials, construction, and design of gas regulators can affect the delivery of low-level reactive gas mixtures.

Following on from the above Pittcon report, this month's "GC Connections" provides information on recently introduced gas chromatography instruments and accessories.

In the final of this two-part series examining trends in column introductions at the recent Pittcon 2004, Ron Majors looks at gas chromatography columns, sample preparation products, hardware, accessories and kits for chromatography and sample preparation.

A selection of mini application note write-ups

GC column bleed has been postulated to be caused by "backbiting" of the siloxane chain and volatility of noncrosslinked oligimers...

In another of Ettre's historical examinations of the early days of gas chromatography, he discusses four major application fields in which the technique changed the way chemists perform analyses. These include hydrocarbon analysis, fatty acid analysis, flavour compounds and essential oils analysis, and environmental analysis. In addition, he also explains how GC helped in the evolution of liquid chromatography and in the development of the scientific industry.

Editor of LC–GC Europe, David Hills, reports on his findings from a GC users' survey conducted amongst a selection of LC–GC Europe readers.

In this month's "GC Connections," John Hinshaw reports on new gas chromatography instruments and accessories exhibited at the 55th Pittsburgh Conference.

This month's column examines the basic measurements of a peak's size and shape for the purposes of assessing and monitoring chromatographic separations over a period of time.

A novel device for coupling on-line in-tube SPME with capillary GC is presented by the guest authors and the method's application demonstrated for the analysis of contaminants in water.

In this month's "GC Connections," John Hinshaw examines the anatomy of chromatographic peaks with attention to features that help determine the suitability of individual chormatographs for a specific analysis task.

The latest newcomer to the collection of GC techniques, GCXGC, is examined in this instalment. Although this technique is capable of delivering more GC information in a shorter time than other methods, its technical complexity has slowed down widespread acceptance. John Hinshaw explains...

This review discusses the operating principles of and current applications for two-dimensional gas chromatography with heartcutting.

In the welcome return of this column, Bob McDowall revisits the evolving topic of 21 CFR 11 compliance, as it applies to chromatographers. He examines the FDA's activities in 2003 and outlines the current status of its regulations over, and guidance for, electronic records issues.

This month's "GC Connections" column provides advice on how to select the right gases and thus alleviate the problems associated with their use. It offers points to check with regard to gas grades, purities and impurities and how to ensure gas quality.

Phytosterols and stanols (hydrogenated phytosterols) are naturally occurring substances?

The current concern over acrylamide levels in food has unexpectedly brought amino acid analysis to the forefront . . .

In this month's installment, John Hinshaw reports about the 24th International Symposium on Capillary Chromatography and Electrophoresis held in May.

John Hinshaw examines the operating environment, setup, and operating conditions necessary to ensure high detector performance.