Shen Jiang, Li Shuai, Qi Hanfei. Influence of Low Temperature Vacuum Drying on the Quality of Carrots[J]. Journal of refrigeration, 2012, 33(2). DOI: 10.3969/j.issn.0253-4339.2012.02.064.
and the investigation of a new type of low temperature vacuum drying method in the non-frozen state of the product under drying processing is carried out through experiments. Low-temperature vacuum drying and vacuum freeze-drying and hot air drying method were compared to study the impact of low temperature vacuum drying of carrot nutrients (such as reducing sugar
Vitamin C
etc.) and rehydration characteristics. The results show that: by comparing the Vitamin C content of three kinds of drying methods
hot air drying and vacuum freeze-drying of carrots
Vitamin C loss rate is about 2.14 times and 2.47 times of low-temperature vacuum drying.