- Abstract: Ginkgo biloba powder was prepared from five different drying methods, such as hot air drying, vacuum freeze drying, microwave drying equipment, spray drying and drum drying. The effects of five drying methods on ginkgo biloba acid removal rate, nutrient active ingredient, color difference, water holding capacity, oil holding property and gelatinization characteristics were studied.
The results showed that: drum drying had the most significant effect on the removal of ginkgolic acid, and the removal rate was as high as 78.61%, which greatly improved the safety of the product, while the removal rate of ginkgolic acid by other drying methods was less than 40%. Spray drying and vacuum freeze-drying retained better retention of active ingredients, retention of flavonoids and lactones reached 86% and 90%, respectively, while drum drying was relatively poor; total color difference ΔE of ginkgo powder produced by spray drying and vacuum freeze-drying It is smaller (about 20.43), and the ginkgo powder produced by drum drying has a large solubility, water absorption index and oil absorption index of 12.80%, 8.23 g / g and 2.95 g / g, respectively.
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