Time Mean variation pH (%) (IC95%) Mixtures 13-16 Mixtures 17-20 Mixtures 21-24 t7 -8.30 (-8.92 to -7.68) -10.85 (-11.34 to -10.36) -15.95 (-17.40 to -14.50) t15 -8.18 (-8.59 to -7.76) -10.88 (-12.13 to -9.62) -16.45 (-16.68 to -16.22)

t7: 7 days of storage t15: 15 days of storage IC95%: Confidence interval at 95%

Table 8: Mean variation of pH for mixtures containing FDG after 7 and 15 days of storage.