3.1. Composition and pH development
Incubation times necessary for achieving a pH value of 4.6 at
42 C were between 3 h 49 min and 4 h 20 min. At the 0.1% fat level
the incubation tended to be shorter (15 min) with 4% of Actilight.
No influence of the additives on incubation time was observed at
the 3.5% fat level.
After seven days of storage at 5 C, the pH values of the yoghurt
samples were between 4.03 and 4.15 (Table 3) and independent of
the fat level. The Stevia variant without Actilight had a slightly
higher pH value. The pH values were significantly lower for the
repetition (4.0 instead of 4.1) but probably not relevant for the
flavour and the texture. The determined fat content listed in Table 3