The ginger essential oil obtained from supercritical CO2 extraction of Guizhou small yellow ginger was used as raw material for the preparation of water-soluble ginger essential oil by solvent method of de-terpene. Headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME-GC-MS) was used to qualitatively and quantitatively analyze the volatile components of ginger essential oil, in combination with odor activity value (OAV), the contribution of volatile components in ginger essential oil to aroma was analyzed to determine the separation of target terpenoids and retention of target aroma. The relative content of these two components was taken as the index and the optimal technological parameters were obtained through single factor test, which were propylene glycol aqueous solution of 70% (volume fraction), centrifugal speed of 6 000 r/min, centrifugal time of 15 min, stirring temperature of 30 ℃, stirring time of 60 min, and the material liquid ratio of 3∶20 (g∶mL). Compared with the raw ginger essential oil, the relative content of the target diterpenoids of the water-soluble ginger essential oil prepared under the conditions of the process parameters was reduced from 49.20% to 36.75%, and the retained aroma compounds increased from 18.59% to 25.70%. This study provides a new technical feasibility for the preparation of water-soluble ginger essential oil, helps to expand the market application space and scope of ginger essential oil, and provides a new research idea and method for the preparation of water-soluble essential oil from natural plant essential oil.
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