pH
The pH, unlike titratable acidity, did not change significantly during 10 days of storage at 4°C (3.87±0.07) (Figure 3). Sinclair and Jolliffe (1960) also observed that pH and titratable acidity were not direct- ly related in samples of 'Valencia' orange juice. This is probably due to the effect of the buffer capacity of the fruit tissue, and it is a positive aspect since a small variation in pH might imply a negative effect in flavour (Chitarra and Chitarra, 1990).