Fig. 1

Phosphate-binding capacity of each phosphate binder. Each column in the figure shows the mean + standard error of three cases (two cases at pH 2 for calcium carbonate, and ND at pH 3 and 4, one case at pH 5 and 6, and two cases at pH 7 and 8 for ferric citrate hydrate, as no adsorption was observed in any or all cases). The phosphate-binding capacity of each investigational drug was calculated as the quantity of phosphate adsorbed onto 1 g of phosphate binder ingredient (metal or sevelamer). ND: Not detected