Dionex is pleased to announce new
on-line
solid-phase extraction (SPE) method using two
Acclaim® Mixed-Mode guard columns as SPE cartridges to eliminate anionic
interferences and enrich diquat and paraquat. Mixtures of paraquat and diquat
are widely used to control crop and aquatic weeds; however, contamination of
drinking water with these pesticides is considered a risk factor for liver,
heart, lungs, and kidney illnesses. Various regulatory agencies have specified maximum
admissible concentrations of paraquat and diquat in drinking water. Therefore,
simple and effective sample preparation and sensitive analytical methods are
necessary for determining paraquat and diquat in environmental waters.
Application Note 274: Sensitive On-Line SPE-HPLC Determination of Paraquat and Diquat in
Drinking and Environmental Waters demonstrates the elimination of interferences in tap and pond
water with baseline separation of paraquat and diquat on the Dionex Acclaim Trinity
TM P1 column. Efficient and sensitive analyses are
achieved with the UltiMate® 3000 HPLC system with
on-line SPE configuration controlled by the Chromeleon® Chromatography Data System software.
For further information please visit
www.dionex.com
Dionex (NASDAQ:DNEX) is a global leader in the manufacturing and
marketing of liquid chromatography and sample preparation 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.
Acclaim,
Chromeleon, and UltiMate are registered trademarks, and Trinity is a trademark
of Dionex Corporation.
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