Use newer Thermo Scientific™ Dionex™ IonPac™ AS22 columns as substitutes for Dionex IonPac AS4 Analytical & Guard Anion-Exchange Columns. The Dionex IonPac AS4 is only available in limited quantities for customers who have established validated methods using this column. The Dionex IonPac AS22 column provides fast separation of common inorganic anions in a variety of sample matrices including drinking water, wastewater, process streams, and scrubber solutions using a simple isocratic carbonate/bicarbonate eluent.
IonPac polymeric columns address a variety of chromatographic separation modes including ion exchange, ion exclusion, reversed-phase ion pairing and ion suppression.
Limited warranty period: Subject to all warranty requirements and exclusions set out in our Terms and Conditions of Sale, this product is warranted from the date we ship the product and for ninety (90) days thereafter. Disclaimer to internal research use restriction: Any restrictions on the purchaser to utilize the product(s) for internal research purposes only does not apply to the product(s) on the web pages associated with this statement.