The IonPac^® AS23 carbonate-based anion-exchange column is specifically designed for trace bromate in drinking water. Its high capacity and selectivity allows for the determination of bromate in drinking water at the low µg/L level.  The AS23 meets the performance requirements of U.S EPA Methods 300.0 and 300.1.

• Optimized isocratic carbonate/bicarbonate eluent for the separation of oxyhalides and inorganic anion in a variety of sample matrices.
• Recommended carbonate-based anion-exchange column for trace bromate in drinking water matrices.
• Meets performance requirements specified in U.S. EPA Methods 300.0 and 300.1.
• Ideal alternative for AS9-HC oxyhalide and inorganic anion applications.
• Simplified Reagent-Free^TM  IC operation provided by the EG50 Eluent Generator and EPM, which require only a deionized water source to produce potassium carbonate/bicarbonate eluent.
• Simple, accurate eluent preparation with the AS23 Eluent Concentrate—just dilute in deionized water and start operation.
• Eluent suppression using the ASRS^® ULTRA or AAES^® technology provides Reagent-Free IC operation with low backgrounds and enhanced analyte sensitivity.
• High Capacity: 320 µeq/col. (4 x 250 mm column).
• Operate at ambient or elevated temperatures. Column selectivity is optimized for a 30 °C operating temperature to ensure reproducible retention times in all environmental conditions.
• Compatible with organic solvents to enhance analyte solubility, modify column selectivity, or for effective column cleanup.

The IonPac AS23 high-capacity, carbonate-based anion-exchange column is designed for the analysis of oxyhalides and the common inorganic anions including fluoride, chlorite, bromate, chloride, nitrite, bromide, chlorate, nitrate, phosphate, and sulfate in drinking water, ground water, wastewater, and other diverse sample matrices. The key application for the IonPac AS23 anion-exchange column is determination of trace bromate in drinking water matrices using an isocratic carbonate/bicarbonate eluent with suppressed conductivity detection. The AS23 column can be used in combination with the EG50 Eluent Generator and the Electrolytic pH Modifier (EPM) which automatically produces potassium carbonate/bicarbonate eluents from water. The AS23 column is an ideal alternative, using carbonate-bicarbonate eluents, for AS9-HC applications.

This separation meets the performance requirements specified in U.S. EPA Method 300.0  and EPA Method 300.1 for the determination of oxyhalides produced as by-products in disinfection of drinking water. The selectivity of the AS23 ensures that bromate, a toxic by-product in ozone disinfection, can be quantified at low µg/L concentrations using suppressed conductivity detection even in the presence of very high concentrations of chloride, carbonate, and sulfate.  The AS23 allows the analysis of most drinking water, disinfected with ozone, without the use of sample pretreatment or preconcentration. Use the Anion Self-Regenerating Suppressor (ASRS ULTRA II) or Anion Atlas^® Electrolytic Suppressor (AAES) with the AS23 column for eluent suppression.