Fig. 1. Anions adsorbed and desorbed during successive equilibrations of Zr(Sb)O2 and ZrO2 with 10 mM NaNO3 (pH 5.6). The negative values represent adsorption to the material and the positive values represent desorption to the solution phase. The standard deviations of pH measurements are now showing in figure as they were extremely small related to the measured value.
