Abstract: A process and a device for synthesizing labeled compounds. The process involves preparing a labeling agent, labeling a precursor with the labeling agent, where the precursor is a protected substrate, and deprotecting the labeled precursor to convert the labeled precursor to a labeled compound by passing the labeled precursor through a solid support in a column or a cartridge. The process may be used to convert labeled tetraacetylfluoroglucose (TAFg) to labeled fluoro-deoxy-glucose (FDG) for use in nuclear medical imaging. The process is more rapid than conventional methods and is performed at room temperature rather than high temperature for conventional technology.