METHODS: Vacuum freeze drying and oven drying were adopted.The content of gastrodin was determined by RP-HPLC.

• 方法:采用RP-HPLC法测定真空冷冻干燥法和传统的水煮烘干法加工后的天麻中的天麻素的含量,并比较两者的外观特征。