2. The residual ratio of AsA in the kiwifruit samples during hot air
drying and vacuum drying was 0.75–0.88 and 0.90–0.99,
respectively. The antioxidant activity in the samples during
hot air drying and vacuum drying was 4.5–5.5 and 4.3–5.2,
respectively. Changes in the sample hardness, L-ascorbic acid,
and antioxidant activity during drying were analyzed by reaction
rate theory, and the calculated results concurred with the
actual data