3.3. Effects of thermosonication on ascorbic acid
The amount of ascorbic acid in fresh apple juice was 5.27 mg/
100 mL (Table 4). We observed an increase in ascorbic acid content
of apple juice sonicated at 20 C, whether in-bath (USB20-
30) or with-probe (USP20-5 and USP20-10). In our previous
study, a similar increase in ascorbic acid content of apple juice
treated with ultrasound at a temperature of 20 C was observed