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AU205: Assay for Citrate and Phosphate in Pharmaceutical Formulations Using a High-Pressure Compact Ion Chromatography System

Instrument Type: IC

Using ion chromatography methods to determine citrate and phosphate in pharmaceutical formulations has been previously demonstrated, validated, and adopted by The United States Pharmacopeia (USP) in General Chapter< 345>. The monograph specified an L61 column. Here we demonstrate that a higher porosity, higher capacity, and smaller particle size L81 column with similar selectivity to L61 has much higher efficiencies, capacities, and sensitivities, and extended linear range with reduced run times.