August 2009, Sunnyvale, CA—The ASE® Prep CR H+ form is a cation-exchange resin in the hydrogen ion form that neutralizes strong bases in samples that have undergone pretreatment for base hydrolysis.

Many samples require pretreatment with acids or bases to improve the solubility of analytes or release them from the sample matrix. For example, with food samples, acid or base hydrolysis is used to hydrolyze lipids to free fatty acids to facilitate their extraction with organic solvents. For dairy products, base hydrolysis is usually preferred over acid hydrolysis.

This product is designed for use with the new Dionex ASE 150 and 350 systems (which include pH-hardened pathways with
Dionium™ components) for the determination of lipids from food after base hydrolysis. The ASE Prep CR H+ form can also be
used in other applications where strong base pretreatment has occurred.

For more information, visit http://www.dionex.com or contact your local Dionex representative.

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.

Dionium is a trademark and ASE is a registered trademark of Dionex Corporation