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Comparative Study
. 2022 Jan 12;27(2):479.
doi: 10.3390/molecules27020479.

Analysis of Volatile Components of Jasmine and Jasmine Tea during Scenting Process

Yangbo Zhang  1   2 , Yifan Xiong  1 , Huimin An  1   2 , Juan Li  1   2 , Qin Li  1   2 , Jianan Huang  1   2 , Zhonghua Liu  1   2   3
Affiliations
Comparative Study

Analysis of Volatile Components of Jasmine and Jasmine Tea during Scenting Process

Yangbo Zhang et al. Molecules. .

Abstract

Jasmine tea is widely loved by the public because of its unique and pleasant aroma and taste. The new scenting process is different from the traditional scenting process, because the new scenting process has a thin pile height to reduce the high temperature and prolong the scenting time. We qualified and quantified volatiles in jasmine and jasmine tea during the scenting process by gas chromatography-mass spectrometry (GC-MS) with a headspace solid-phase microextraction (HS-SPME). There were 71 and 78 effective volatiles in jasmine and jasmine tea, respectively, including 24 terpenes, 9 alcohols, 24 esters, 6 hydrocarbons, 1 ketone, 3 aldehydes, 2 nitrogen compounds, and 2 oxygen-containing compounds in jasmine; 29 terpenes, 6 alcohols, 28 esters, 8 nitrogen compounds, 1 aldehyde, and 6 other compounds in jasmine tea. The amounts of terpenes, esters, alcohols, nitrogen compounds, and hydrocarbons in jasmine and tea rose and then fell. The amount of oxygenated compounds of tea in the new scenting process first rose and then fell, while it showed a continuous upward trend during the traditional process. The amount 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. This study indicated that jasmine tea produced by the new scenting process had better volatile quality, which can provide proof for the new scenting process.

Keywords: JTF index; jasmine tea; new scenting process; traditional scenting process; volatile components.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
The change during scenting process. (A) humidity change of jasmine. (B) temperature change of jasmine. (C) water content of scented jasmine. (D) water content of jasmine tea. JF: jasmine flower; NP: jasmine flower in the new scenting process; TP: jasmine flower in the traditional scenting process; NPT: jasmine tea in the new scenting process; TPT: jasmine tea in the traditional scenting process; En: environment.
Figure 2
Figure 2
Changes in JTF index. (A) JTF of jasmine. (B) JTF of jasmine tea.
Figure 3
Figure 3
Comparison and analysis of volatile components in jasmine during the different scenting processes. (A) PCA score chart. (B) HCA chart.
Figure 4
Figure 4
Comparative analysis of volatile components of TP and NP. (A) OPLS-DA score plot. (B) VIP plot. (C) permutation tests plot. (D) S-plot. The color in B and D means that differential volatile component is marker in green color; those significant differential volatile components with a VIP > 1 and FC > 1.5 or <0.67 (p < 0.05) marker in red color.
Figure 5
Figure 5
Comparative analysis of volatile components of JF and TP. (A) OPLS-DA score plot. (B) VIP plot. (C) permutation tests plot. (D) S-plot. The color in (B) and (D) means that differential volatile component is marker in green color; those significant differential volatile components with a VIP > 1 and FC > 1.5 or <0.67 (p < 0.05) marker in red color. Analysis of the Volatile Components between JF and NP.
Figure 6
Figure 6
Comparative analysis of volatile components of JF and NP. (A) OPLS-DA score plot. (B) VIP plot. (C) permutation tests plot. (D) S-plot. The color in B and D means that differential volatile component is marker in green color; those significant differential volatile components with a VIP > 1 and FC > 1.5 or <0.67 (p < 0.05) marker in red color.
Figure 7
Figure 7
Comparative analysis of different volatile components of jasmine tea. (A) Comparison and analysis of volatile components in jasmine tea during the different scenting processes: (a) PCA score chart; (b) HCA chart. (B) Comparative analysis of volatile components of TPT and NPT: (a) OPLS-DA score plot; (b) VIP plot. (c) permutation tests plot. (d) S-plot. The color in (B)/(b) and (d) means that differential volatile component is marker in green color; those significant differential volatile components with a VIP > 1 and FC > 1.5 or <0.67 (p < 0.05) marker in red color.
Figure 8
Figure 8
Changes in main aromatic substances of jasmine during the scenting process. (A) terpenes. (B) esters. (C) alcohols. (D) nitrogens. (E) oxygenates. (F) hydrocarbons.
Figure 9
Figure 9
Changes in the main aromatic substances of jasmine tea during scenting. (A) terpenes. (B) esters. (C) alcohols. (D) nitrogens. (E) oxygenates. (F) hydrocarbons.
Figure 10
Figure 10
Diagram of aroma extraction device.
See this image and copyright information in PMC

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