](scipharm.0000.00.000f0){#f0-scipharm.0000.00.000}  ![Typical GC chromatograms of a) blank solution, b) standard solution, c) sevelamer hydrochloride spiked with allylamine including known residual solvents, and d) sevelamer carbonate spiked with allylamine including known residual solvents.](scipharm.0000.00.000f0){#f0-scipharm.0000.00.000}  ![Typical GC