We observed that tomatoes had higher ascorbic acid (AA) than
ginger. Kerkhofs et al. (2005) reported that the AA content in tomatoes
was 277 mg/100 g dm, and a report by Giovanelli, Zanoni,
Lavelli, and Nani (2002) showed 330 mg/100 g dm. In our study,
AA contents of fresh ginger and tomatoes were 79.86 ± 4.37 and
310.34 ± 7.23 mg/100 g dm, respectively. For sun, oven, vacuum
oven and freeze dried tomatoes, AA contents were 24.39 ± 5.93,
4.14 ± 1.29, 17.37 ± 1.25 and 65.47 ± 7.1 mg/100 g dm, respectively.
We found that the AA content in dried tomatoes was less
than that in fresh tomatoes (Fig. 4). Thermal methods caused much
more loss when compared with freeze drying (Table 1)