Effect of ultrafine grinding on volatile compounds in winter jujube powder

The change of volatile compounds in ultrafine grinding winter jujube powder made by short-and medium-wave infrared drying and explosion puffing drying by combining solid phase micro- extraction with GC- MS method was studied. 38 and 44 kinds of volatile compounds were identified from ordinary jujube powder and ultramicro jujube powder made by short-and medium-wave infrared drying, respectively.35 and 51 kinds of volatile compounds were identified from explosion puffing drying, respectively. After ultrafine grinding, the contents of phenols, alcohols and alkanes compounds were significantly increased. The contents of esters, alcohols and aldehydes were decreased obviously.