[abstract] Gastrodia elata was dried by sun drying, sulfur fumigation, hot air drying, microwave drying equipment, infrared drying and various combined technologies. The effects of different drying methods on the quality of Gastrodia elata were investigated by comparing the properties, extracts and active ingredients of each sample.
The results showed that the samples obtained by sulfur fumigation, hot air drying and hot air microwave drying had better characteristics; different drying methods had little effect on the extracts, and the content of the extracts after hot air drying was higher; sulfur fumigation, microwave drying and infrared drying alone could cause the transformation of stilbene glycosides and the decrease of the content of Gastrodia cannabis polysaccharides.
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