The effects of different temperatures on grape quality were studied by hot air drying, taken Turpan Thompson seedless grapes as material, which was treated by dry-promoter agent, and dried by hot air drying in 30 ℃, 35 ℃, 40 ℃, 45 ℃, respectively. The results showed that: in the process of drying seedless white grapes, the contents of ascorbic acid, titratable acidity, total phenol decreased, while browning was raised. Comprehensive comparison, hot air drying in 40 ℃ can prepare raisin better quality.

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