Gas Chromatography (GC)

AC Analytical Controls developed a new chromatographic solution that complies with all ASTM & EN chromatographic test methods listed in biodiesel specifications: the AC all-in-one Biodiesel analyser. Analysis results demonstrate that the AC analyser complies with EN 14103, EN 14105, EN 14106, EN 14110 & ASTM D6584 methods.

In addition to the universal detectors used in gas chromatography (GC), selective detectors have also played an important role in the rapid spreading of the utilization of the technique. Probably the most important selective GC detector is the electron-capture detector, with a very high sensitivity to organic compounds containing chlorine and fluorine atoms in their molecules. The electron-capture detector had a vital role in environmental protection and control - its use helped to prove the ubiquitous presence of chlorinated pesticides in nature and halocarbons in our atmosphere, and made us aware of the global extent of pollution. It was the electron-capture detector that made concentration ranges of parts-per-billion (ppb: 1:109) or even parts-per-trillion (ppt: 1:1012) detectable. Today, these terms are used routinely without realising how formidable such a sensitivity really is: 1 ppb means that a spaceship (or a UFO, depending upon one's inclination) could pick up a particular family of six from..

Size-exclusion chromatography (SEC) and pyrolysis-gas chromatography (Py-GC) are commonly used to characterize copolymers. SEC is a powerful method to determine the molecular-weight distribution of polymers whereas Py-GC provides valuable information on their chemical composition. The combination of these two techniques could yield combined size and composition information for copolymers or polymer mixtures. A fully automated system was constructed to perform these two-dimensional (2D) characterizations. Several examples of the use of this new technique to comprehensively characterize polymers are described.

This month's installment of "GC Connections" discusses factors that can help determine which type of liquid injection technique is appropriate for specific samples, including having to use existing inlet systems that are on-hand in the laboratory with samples for which they might not be ideally suited.

This month's installment of "GC Connections" discusses factors that can help determine which type of liquid injection technique is appropriate for specific samples, including having to use existing inlet systems that are on-hand in the laboratory with samples for which they might not be ideally suited.

Brazilian scientists have teamed to use gas chromatography (GC) and electron-capture detection (ECD) for the testing of wastewater.

As part of a new method developed by researchers from The Nisshin OilliO Group, Ltd., analysis of trans-fatty acids was completed in 20 minutes for non-hydrogenated oils and just 40 minutes for hydrogenated oils.

In an article recently published in Rapid Communications in Mass Spectrometry, researchers developed an application to show that an N, C, and S measurement system allows a three-dimensional view of element dynamics in estuarine systems that are undergoing pollution inputs from upstream watersheds.

In an article recently published in the British Journal of Nutrition, researchers used gas chromatography to determine the fatty acid concentrations of plasma phosphatidylcholine, triacylglycerol, NEFA and cholesteryl esters to test the hypothesis that gender-related differences in n-3 PUFA metabolism are reflected in the concentrations of n-3 PUFA in plasma lipids.

In a note recently published in Clincal Chemistry, researchers describe a method for detection of N2O in exhaled air by using gas chromatography (GC).

Triclosan is an ubiquitous antibacterial, antimicrobial chemical found in numerous consumer health care products today. This article demonstrates that triclosan can be quantitatively determined in commercial hand soaps using reversed-phase solid-phase disk extraction coupled to quantification using capillary gas chromatography-atomic emission detection while avoiding emulsions.

This article presents modified GC-MS method for the analysis of volatile organic compounds by method 8260; this method will dramatically increase instrumental throughput.

Phenomenex, Inc., a global leader in the separation sciences business, has been notified by R&D Magazine that it has won the coveted R&D 100 Award for the second year in a row.

The exact method used depends upon the type of hydrocarbon contamination in the soil.

The volatile extraction market consists of three techniques: purge and trap, headspace, and thermal desorption equipment. These systems are often employed as a sampling method for gas chromatography (GC) instrumentation but are also used with IR detectors, electrochemical sensors of electronic noses, and mass spectrometers.

The laboratory life science and analytical instrument industry is comprised of a large, diverse group of organizations that manufacture and distribute their products worldwide. However, overall industry sales are concentrated among a small set of companies. Approximately 950 firms are included in the industry, but only about 100 companies have sales above $50 million.

In this month's issue, columnist Ron Majors and coauthors discuss the important steps in the successful production of fused-silica gas chromatography (GC) capillary columns.

Optimizing peak shape in capillary gas chromatography (GC) is essential for the consistent, accurate analysis of residual solvents in pharmaceutical compounds.

According to an Agilent Technologies publication on sports drug testing (1), the first screening step (with a urine sample, for example) typically is performed using gas chromatography (GC).

Peptide mapping is one of the preferred techniques for the comprehensive characterization of biopharmaceutical products and is often the analytical method of choice for studying a protein's primary structure.

I started writing for LCGC in the summer of 1987. At the time, I was involved with an instrument company team specifying a new gas chromatograph.

The 58th Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy was held February 25 to March 1, 2007, at McCormick Place in Chicago, Illinois.

In the half-century since its introduction, gas chromatography (GC) has evolved into one of the most widely used tools for chemical analysis.