## 3 Results
### Differences in Aroma Composition of Lingtou Dancong Oalong Tea among Different Altitudes
& - & - & - & \(>\)32 & \(>\)32 & \(<\)16 & Green, grassy, fresh \\
15 & (Z)-\(\beta\)-Ociner & 34 & 2.95 & 2.69 & 1.93 & \(>\)32 & \(>\)16 & \(>\)16 & Frolal \\
16 & 1-Ethyl-1H-pyrrole-2-carbaldehyde & 37 & 4.47 & 3.88 & 5.56 & \(>\)32 & \(>\)32 & \(>\)32 & Woody, herbal \\
17 & 2-Cycl-CJ-CJ-CJ-CJ-CJ-CJ-CJ-CJ-CJ-CJ-CJ-CJ-CJ-CJ-CJ-  
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline  & \multicolumn{2}{c}{**OT \({}^{\star}\)**} & \multicolumn{3}{c}{**OAV \({}^{\text{b}}\)**} & \multicolumn{3}{c}{**FD \({}^{\star}\)**} & \multicolumn{3}{c}{**Offactive Family**} \\ \cline{3-10}
**NO** & **Odorants** & **(ng/kg)** & **High** & **Medium** & **Low** & **High** & **Medium** & **Low** & **Offactive Family** \\ \hline
36 & 2-Phenyl-2-buttenal & 500 & 0.16 & 0.17 & 0.15 & \textgreater{}128 & \textgreater{}128 & \textgreater{}128 & Green, grassy, fresh \\
37 & 2-4-Decational & n.f. & - & - & - & -32 & \textgreater{}32 & \textgreater{}16 & Honey, baslamic, creamy \\
38 & Indole & 100 & 38.82 & 8.73 & 38.14 & \textgreater{}128 & \textgreater{}64 & \textgreater{}128 & \textgreater{}16 \\
39 & Thesingame B & n.f. & - & - & - & \textgreater{}32 & \textgreater{}32 & \textgreater{}32 & Woody, herbal \\
41 & (_E_)Methyl geruate & n.f. & - & - & - & \textgreater{}64 & \textgreater{}64 & Woody, herbal \\
41 & 1-2-Dihydo-1-16-trimethylhnphthalene & n.f. & - & - & - & -32 & \textgreater{}32 & \textgreater{}64 & Friend \\
42 & \(\gamma\)-Nonmalactone & 27 & 7.25 & 7.77 & 5.71 & \textgreater{}64 & \textgreater{}128 & \textgreater{}64 & Honey, baslamic, creamy \\
43 & (_E_)-D-amascome & 0.05 & 36.00 & 357.40 & 316.00 & \textgreater{}512 & \textgreater{}512 & \textgreater{}512 & Honey, baslamic, creamy \\
44 & (_Z_)-Jasmone & 21,600 & 0.05 & 0.02 & 0.02 & \textgreater{}64 & \textgreater{}32 & \textgreater{}32 & \textgreater{}32 \\
45 & Dehydrohydrohydrohydroion & n.f. & - & - & - & \textgreater{}32 & \textgreater{}32 & \textgreater{}32 & \textgreater{}32 & \textgreater{}32 \\
46 & \(\alpha\)-demone & 76 & 1.99 & 1.46 & 1.13 & \textgreater{}256 & \textgreater{}256 & \textgreater{}256 & Woody, herbal \\
47 & Isoquenol & n.f. & - & - & - & \textgreater{}32 & \textgreater{}32 & \textgreater{}64 & Friend \\
48 & \(\gamma\)-D-combence & n.f. & - & - & - & \textgreater{}128 & \textgreater{}64 & \textgreater{}128 & Honey, baslamic, creamy \\
49 & _trans_-\(\theta\)-lonome & 7 & 31.66 & 41.16 & 32.87 & \textgreater{}512 & \textgreater{}512 & \textgreater{}512 & \textgreater{}512 \\
50 & _cis_-Jasmine lactone & 7 & 1077.00 & 2820.00 & 1170.86 & \textgreater{}128 & \textgreater{}64 & \textgreater{}128 & Honey, baslamic, creamy \\
51 & \(\beta\)-Dodecalactone & n.f. & - & - & - & \textgreater{}128 & \textgreater{}128 & Honey, baslamic, creamy \\
52 & Dihydoactinidiode & 500 & 0.91 & 1.63 & 1.56 & \textgreater{}16 & \textgreater{}16 & Woody, herbal \\
53 & (_E_)-Neufold & 10 & 587.0 & 16.08 & 62.08 & \textgreater{}64 & \textgreater{}32 & \textgreater{}32 & Friend \\
54 & Hexyel benzoate & 73 & 0.03 & 0.01 & 0.00 & \textgreater{}16 & \textgreater{}16 & \textgreater{}16 & Green, grassy, fresh \\
55 & Carpophyllserine oxide & n.f. & - & - & \textless{}16 & \textless{}16 & \textless{}16 & \textless{}16 & Floral \\
56 & Methyllyanimate & 3 & 27.95 & 8.67 & 45.68 & \textgreater{}16 & \textless{}16 & \textgreater{}32 & \textgreater{}32 & Woody, herbal \\
57 & \(\alpha\)-Cadinol & n.f. & - & - & - & \textgreater{}64 & \textgreater{}32 & \textgreater{}32 & Woody, herbal \\
58 & Bis  
to clarify their contributions to the aroma profile of Lingtou Dancong oolong tea. All of the detected odor compounds had an FD factor of >16. The highest FD factor (512) indicated the greatest contribution, and the compounds with this FD value were floral or honey odor compounds: i.e., hotriend (honey), _cis_-citral (honey), D-\(\beta\)-damascenone (honey), and _trans_-\(\beta\)-ionone (floral).