Dionex™ OnGuard™ II A Cartridges

Remove inorganic anions and strong organic acids contaminants from sample matrices and neutralize highly acidic samples to improve ion chromatography (IC) performance and facilitate trace ion analysis. Performed prior to IC analysis, the Thermo Scientific™ Dionex™ OnGuard™ II A Cartridges are an off-line sample preparation technique that eliminates these matrix interferences using styrene-based, anion-exchange resin in the bicarbonate. Use them singly or in series, or pretreat up to 12 samples in parallel using the optional Dionex OnGuard Sample Prep Station.

Solve Tough Application Problems

• Boost sensitivity, lower baselines and improve separations
• Achieve reproducible trace-level determinations in concentrated matrices
• Increase the lifetime of your analytical columns
• Use for a wide range of matrices thanks to wide pH stability
• Supports applications with choice of 1cc and 2.5cc formats, as well as syringe barrel format for robotic processing (custom order)

Easy-to-Use, Leak-Free

• Leak-free, no-channeling cartridge
• Quick, secure Luer inlet connections

Performance Guaranteed

• Ships with a Certificate of Analysis that verifies capacity, performance and cleanliness

Pretreat 12 Samples Simultaneously

• Use the optional Dionex OnGuard Sample Prep Station and OnGuard Sample Pretreatment Cartridges