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The Column: January 2009

"Green HPLC" - A Status Review Björn-Thoralf Erxleben Comprehensive Two-Dimensional Gas Chromatography for Achieving Nitrogen Speciation in Middle Distillates F. Adam, F. Bertoncini, N. Lahoutifard, A.Addinall, D. Thiébaut, M.-C. Hennion and Marion Courtiade A Dissolved/Particulate Baseline Study of Polyaromatic Hydrocarbons in Particulate-Laden Water Friederich Werres and Robert S. Johnson News Tolerable levels for daily intake of melamine, a GPC/SEC training course, a company acquisition and a patent license agreement are featured this month. Incognito Overcoming the Acetonitrile Crunch... Follwing a decrease in the global production of acetonitrile, Incognito considers the alternatives for those using this as a solvent in important HPLC separations. Market Trends and Analysis Market Profile: Dissolution Testing Glenn Cudiamat

Short Courses

Upcoming short courses in the chromatography field.

Calendar

Upcoming events in the chromatography field.

I regularly receive e-mails from readers with a wide variety of questions. Some of these blossom into full-blown columns, but many are answered with just a short response. As I cleaned out my inbox recently, I chose a few of these to share. There is no central theme this month, but hopefully you will pick up some useful information from these topics related to practical operation of the liquid chromatography (LC) system.

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Hypercrosslinked polystyrene-type (solid-phase extraction) SPE materials exhibit a unique ability to enter p-interactions with aromatic, heterocyclic and unsaturated compounds. This property permits selective extraction and pre-concentration of the above classes of species from non-polar media and fatty matrices. The principle has been exploited for developing analytical protocols to determine polar furan derivatives in mineral transformer oil, polyaromatic hydrocarbons (PAHs) in smoked fish and for the fractionation of polychlorinated aromatic compounds in environmental matrices.

Thar Instruments, Inc. (Pittsburgh, Pennsylvania) announced that its TharSFC International Users Meeting will be held at the Hilton Newark Penn Station in Newark, New Jersey on February 6, 2009.