# Analysis of Volatile Components of Jasmine and Jasmine Tea during Scenting Process
## 5 Conclusions  
There were 71 kinds of effective volatile component in jasmine, including 9 alcohols, 24 esters, 24 terpenes, 6 hydrocarbons, 1 ketone, 3 aldehydes, 2 nitrogen-containing compounds, and 2 oxygen-containing compounds. A total of 78 effective volatile components were detected in jasmine tea, including 6 alcohols, 28 esters, 29 terpenes, 8 nitrogen-containing compounds, 1 aldehyde, and 6 others compounds. The JTF of jasmine and jasmine tea showed a trend of first increasing and then decreasing during the scenting process. Compared with the traditional scenting process, the change in the JTF index of jasmine during the new scenting process was relatively small, and the overall maintenance was at a high level, which was closer to the changing trend of the JTF index of isolated jasmine. The quantitative results showed that the kinds of volatile components of jasmine did not change significantly during different periods, but the amounts of each volatile component were quite different. The amounts of volatile components of jasmine in terpenes, oxygenates, esters, alcohols, nitrogen compounds, and hydrocarbons all showed a trend of increasing first and then decreasing. The alcohols and hydrocarbons of TP were higher than those of NP. The volatile components of jasmine tea generally increased first and then decreased. The amounts of volatile components of jasmine tea in terpenes, esters, alcohols, nitrogen-containing compounds, and hydrocarbons all increased first and then decreased. The oxygenated compounds in the NPT first rose and then fell, while the TPT showed an upward trend. Except for the amounts of alcohols and hydrocarbons in the TPT, other volatile components were lower than those in the NPT. The quantitative results obtained were analyzed by PCA, HCA, and OPLS-DA, and substances with a VIP value greater than 1 were selected and summarized as differential volatile components, namely, benzyl butyrate, benzyl acetate, n-hexyl benzoate esters, methyl benzoate, ethyl benzoate, 3-hexen-1-ol, phyllo acetate, \(\alpha\)-farnesene, linalool, cis-3-hexanol, and benzyl alcohol. During the scenting process, the main volatile components of jasmine tea first increased and then remained stable or slightly decreased. The benzyl butyrate and benzyl alcohol of scented flowers and isolated fresh flowers showed a downward trend. Other volatile components all showed a trend of rising first and then falling. The amounts of volatiles in jasmine and tea produced by the new scenting process were higher than that of the traditional scenting process at the same time. These results indicated that jasmine tea produced by the new scenting process had better volatile quality, which can provide proof for the new scenting process. **Supplementary Materials:** Table S1: The qualitative and quantitative analysis of volatile components of jasmine flower; Table S2: The quantitative results of volatile constituents of jasmine; Table S3: The qualitative and quantitative analysis of volatile components of jasmine tea; Table S4: The quantitative results of volatile constituents of jasmine tea; Table S5: The variations of OAV values of aroma components in jasmine flower and jasmine tea; Figure S1. The main identified compounds of jasmine in TIC; Figure S2. The main identified compounds of jasmine tea in TIC. **Author Contributions:** [PERSON] and Y.X. collated documents, interpreted the results, and drafted the manuscript; [PERSON], Y.X. and H.A. : data, map checking; [PERSON] and [PERSON]: language editing and polishing; [PERSON] and [PERSON] designed the study. [PERSON] and [PERSON] contributed equally. All authors have read and agreed to the published version of the manuscript. **Funding:** National Tea Industry Technology System Project [grant number CARS-23]. Innovation and demonstration of key technologies for jasmine tea scenting processing [grant number 2020 NK2026]. **Institutional Review Board Statement:** Not applicable. **Informed Consent Statement:** Not applicable. **Data Availability Statement:** Not applicable.