Abstract
A solid-phase extraction cartridge method is a widely used carbon-11 labeling method for obtaining [11C]methionine. Although the process is convenient and efficient, unintended impurity sometimes observed in the final product owing to contamination by volatile iodide generated during [11C]CH3I production. Herein, we suggest a simple method to eliminate impurities contained in [11C]methionine solution using an anion-exchange resin cartridge.
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