DVS Isotherm Plot 1

Figure 1: A DVS isotherm plot, indicating sorption and desorption rates and hysteresis. The isotherm shows a typical hysteresis curve where the adsorption phase is almost identical to the desorption phase (i.e. reversible). Note that at 80 %RH, there is net sorption of 0.9% between adsorption and desorption traces. The material appears to be slightly hygroscopic according to the definition in Ph. Eur.2