August 2007, Sunnyvale, CA—Dionex announces the release of Application Note 191: Determination of Phenols in Drinking and Bottled Mineral Waters Using Online Solid-Phase Extraction Followed by HPLC with UV Detection. Phenols are toxic at low concentrations, and various phenolic compounds are regulated in drinking water in many countries, including the U.S.A., European Union, and Japan. Gas chromatography followed by FID or MS detection is often used for the analysis of phenols in water, but nonvolatiles in many samples can poison GC columns. Previously developed LC techniques require labor- and material-intensive extraction techniques to achieve detection limits low enough for regulatory compliance. Application Note 191 describes a new method that uses online solid-phase extraction (SPE) to automatically prepare samples for analysis. This new method saves the time and expense of manual SPE, while achieving detection limits as low as or lower than GC methods. Dionex (NASDAQ:DNEX) is a global leader in the manufacturing and marketing of liquid chromatography and extraction systems, consumables, and software for chemical analysis. The Company's systems are used worldwide in environmental analysis and by the life sciences, chemical, petrochemical, food and beverage, power generation, and electronics industries. Our expertise in applications and instrumentation helps analytical scientists to evaluate and develop pharmaceuticals, establish environmental regulations, and produce better industrial products.
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