Electronic nose analysis on scent of different varieties of rose flowers and buds
With rose flowers and buds as test materials,the electronic nose technology was used to investigate the scent characteristics of different varieties of rose flowers and buds through multivariate statistical methods such as cluster analysis,Principal Component Analysis(PCA)and Orthogonal Partial Least-squares Discriminant Analysis(OPLS-DA).The results showed that,14 varieties of ros-es were divided into three categories,and the difference markers among the groups were W1W,W5S,and W2S,namely inorganic sul-fides,nitrogen oxides,alcohol ether aldehydes and ketones.The intensity of the three difference markers was group 1>group 2>group 3,all of which had significant differences.The flower buds of 8 rose varieties were divided into three categories,and the differ-ence markers among the groups were W5S and W1W,that was,nitrogen oxides and inorganic sulfides.The intensity of the two differ-ence markers was group 1>group 2>group 3,all of which had significant differences.There were differences in the content of vola-tile components between rose flowers and buds.Most rose buds had higher content of volatile components than rose flowers,while a few rose buds had lower content of volatile components than rose flowers or had little difference in component contents.The main differ-ence markers were W1W,W5S,W2S and W2W,that was,inorganic sulfides,nitrogen oxides,alcohol-ether aldehydes ketones,and organic sulfides.Electronic nose technology could quickly and effectively distinguish the difference of volatile components of differ-ent varieties of rose flowers and buds,and which could provide reference for rose aroma research and rose quality evaluation.
万方数据
维普
