Search

I had been working for a few years at PerkinElmer in Norwalk, Connecticut as a Gas Chromatography (GC) Applications Manager when I started to receive a new technical publication called [...]

The 70th session of the Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy (Pittcon) was held March 17-21, 2019 at the Philadelphia Convention Center in Philadelphia, Pennsylvania. As was the [...]

The 69th session of the Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy (Pittcon) was held February 26-March 1, 2018, at the Orange County Convention Center in Orlando, Florida. Arguably [...]

In 2002, LCGC provided readers with a gas chromatography (GC) glossary to organize the myriad terms used in gas chromatography (1). Likewise, in 2008, the third glossary of common and [...]

Chromatographers, and many others, sometimes encounter questions of whether a series of data over a period of time changes in ways that are significant for the observed process, or whether [...]

I sometimes become involved in conversations that start out with casual observations about data variability and the closeness or lack thereof between two or more sets of analytical results originating [...]

Compressed gases are the unavoidable companions to gas chromatography (GC). To attain large stored gas volumes that will last for a sufficient period, gas suppliers sell compressed gases for GC [...]

Many gas chromatographers are not fully aware of safe practices for handling high-pressure gas cylinders. Gas chromatography (GC) operators should be trained to properly transport, install, connect, and maintain their [...]

The Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy (Pittcon) returned to Atlanta, Georgia, for its 67th annual meeting on March 6-10, 2016. This year's conference saw nearly 13,000 conferees [...]

Chromatographers often use the terms carrier-gas flow and velocity interchangeably when discussing column parameters. In liquid chromatography, the two terms scale together, but in gas chromatography they do not: Doubling [...]

ILLUSTRATION OMITTED] The term dead volume often comes up in chromatography discussions and literature. This month we addresses the nature of this phenomenon, when it can become a problem that [...]

Some might consider gas chromatography (GC) a mature technique. However, several substantial advances in GC technology in the past few years have proven that there is still room for innovation. [...]

Separation scientists may seek an optimum spot between the chromatographic performance required to obtain sufficient results quality, and the time and resources needed to do so. This installment of 'GC [...]

Chromatographers go to great lengths to prepare, inject, and separate their samples, but they sometimes do not pay as much attention to the next step: peak detection and measurement. Identification [...]

Have you wondered how your gas chromatography (GC) system sets and controls gas pressures, flows, and carrier gas velocities electronically? Here, we describe requirements for and the operation of electronic [...]

This month's installment discusses the laboratory deployment of gas cylinders with appropriate pressure regulators, gas filtration, and gas fittings, as well as the question of cylinder retirement. A previous 'GC [...]

The Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy (Pittcon) returned to Chicago's McCormick Place for its 65th annual meeting on March 2-6, 2014. This year, more than 16,200 conferees [...]

Carrier and detector gases, when not generated directly on-site, are transported to laboratory facilities in gas cylinders and stored there until they are used. A recent 'GC Connections' installment (1) [...]

Have you wondered how the gas chromatography (GC) carrier gases helium, hydrogen, argon, and nitrogen are transformed from their natural conditions or precursors into highly purified compressed states inside laboratory [...]

While gas chromatographers may take their septa for granted, in fact these small and seemingly unremarkable polymer disks keep air out of the carrier-gas stream when used in an inlet [...]

Questions about how practical proposed gas chromatography (GC) method changes are often come up during optimization for speed and resolution, or while converting to a different carrier gas. Related objective [...]

L Laminar flow: The smooth time-invariant flow that develops when a liquid is moving under conditions where viscous forces dominant over inertial forces. Laminar flow is characterized by a low [...]

This month in 'GC Connections' John Hinshaw examines the anatomy of chromatographic peaks with attention to features that help determine the suitability of individual chromatographs for a specific analysis task [...]

In this month's installment, we examine long-distance running as a metaphor for gas chromatography separations. For those readers who cannot stop thinking about work while on vacation, here is a [...]

John Hinshaw's review of gas chromatography (GC) instruments and accessories that were newly on display at the Pittsburgh Conference in March 2013, or were introduced to the marketplace in the [...]

Obtaining and reproducing accurate, repeatable flow measurements is of great importance to chromatographers. The quantitative accuracy of their instruments depends on being able to accurately set and measure flow rates [...]

This month we complete a list of questions about gases that began in an earlier installment. The range questions about gases in gas chromatography (GC) is wide and complex. Even [...]

Gas chromatography (GC) resolution and sensitivity are often limited by matrix effects in 'real world' samples that originate outside of a laboratory. GC separation and detection may encounter interference from [...]

It has been about nine years since this list was last published in LCGC (1). During the interim, my toolbox has gained some new items, and a few others have [...]

The 2012 Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy (Pittcon) was held March 11-15 in Orlando, Florida, at the Orange County Convention Center. The 63rd annual occurrence of this [...]

At some point, you may need to bring an idle capillary GC inlet, column, and detector back to operating condition. Here is what to do--including column installation, electronic pneumatic control [...]

This month's GC Connections discusses the fundamentals of instrumentation for headspace sampling, including vial thermostating pressurization, and transfer to the gas chromatograph's inlet. ********** The previous installment of this column [...]

Previous installments in this series covered the basics of valving and its applications in gas chromatography (GC). This month, we will discuss the use of fluidic switching devices for open-tubular [...]