Dionex™ IonPac™ AS31 Analytical and Guard Columns

Achieve faster separation of haloacetic acids (HAAs), bromate, and dalapon in drinking water prior to detection with ion chromatography (IC) and mass spectrometry (MS) with the new Thermo Scientific™ Dionex™ IonPac™ AS31 column. Specifically designed for fast analysis, the Dionex IonPac AS31 provides approximately 39% shorter run times relative to the Dionex IonPac AS24, reducing U.S. EPA Method 557 run time from 57 minutes to approximately 35 minutes. This new hydroxide-selective anion-exchange column has relatively high capacity to allow large loop injections for trace analysis (μg/L) without sample pre-treatment.

• Can meet or exceed the performance requirements of U.S. EPA Method 557.
• High capacity (116 μeq/column) allows injection of complex matrices without overloading the column while maintaining excellent peak shapes for lower concentration analytes.
• Requires no sample pre-treatment when determining haloacetic acids in high-ionic strength matrices.
• Column selectivity has been optimized at an operating temperature of 15°C to ensure reproducible recovery for haloacetic acids.

A high-pressure IC system, such as the Thermo Scientific™ Dionex™ ICS-5000⁺ HPIC™ system or Dionex ICS-6000 HPIC system is required to operate this column under standard conditions.