TN123: Determination of Inorganic Anions in Acid Rain Using a High-Pressure Modular Capillary Ion Chromatography System

Instrument Type: IC

This Technical Note describes the determination of inorganic anions in rainwater samples using a Dionex ICS-5000+ capillary HPIC (High-Pressure Ion Chromatography) system, which can be operated continuously at up to 5000 psi. This high-pressure capability, combined with a 4 μm particle ion-exchange column, such as the Dionex IonPac AS18-4µm anion-exchange column, achieves both high sample throughput and excellent resolution simply by increasing the flow rate. Scaling down from standard bore to capillary scale brings many benefits to IC users. An ICS-6000 can be used for this application.