# Effect of Blue Light Intensity During Spreading on the Aroma of Green Tea
## 3 Results
### Identification and Quantification of the Aroma Compounds in Green Tea Samples by HS-SPME/GC-MS
**} & \multirow{2}{*}{**Name**} & \multirow{2}{*}{**Rt**} & \multirow{2}{*}{**RI**} & \multicolumn{6}{c}{**Content (\(\mu\)g/kg, DW)**} \\ \cline{5-8}  & & & & **HBL** & **MBL** & **LBL** & **DARK** \\ \hline \multicolumn{8}{c}{**Esters**} \\ \hline
45 & Ethyl Acetate & 1.87 & 612 & \(18.88\pm 0.57\) c & 78.78 \(\pm\) 0.29 a & 68.33 \(\pm\) 0.6 b & 67.52 \(\pm\) 0.93 b \\
46 & Hexanoic acid & 7.76 & 1000 & \(12.62\pm 0.02\) a & N.d & \(12.24\pm 0.44\) a & 6.9 \(\pm\) 0.1 b \\
47 & (\(E\))-3-Hexenoic acid & 7.86 & 1006 & \(3.27\pm 0.59\) a & N.d & N.d & N.d \\
48 & Methyl salicate & 12.04 & 1192 & \(142.13\pm 2.45\) b & 174.14 \(\pm\) 1.5 a & 118.26 \(\pm\) 0.83 c & 95.51 \(\pm\) 2.05 d \\
49 & (Z)-Hexanoic & 17.21 & 1380 & N.d & \(287.95\pm 0.89\) b & 434.35 \(\pm\) 1.11 a & 181.14 \(\pm\) 7.63 c \\
50 & acid-3-hexenyl ester & 17.34 & 1389 & N.d & N.d & \(80.74\pm 0.43\) a & N.d \\
51 & Diethyl phthalate & 23.16 & 1594 & \(173.09\pm 2.28\) a & 26.16 \(\pm\) 0.32 b & \(23.53\pm 0.35\) b & N.d \\
52 & Methyl jasmonate & 23.63 & 1648 & \(32.53\pm 0.49\) a & N.d & N.d & N.d \\
53 & 2-Ethlyhexyl-benzoic & 26.37 & 1735 & N.d & \(127.54\pm 2.1\) a & \(86.27\pm 0.77\) b & 24.84 \(\pm\) 0.55 c \\
54 & Diisobutyl phthalate & 30.25 & 1870 & \(64.64\pm 1.62\) c & 66.14 \(\pm\) 0.28 c & 120.69 \(\pm\) 0.6 a & 95.54 \(\pm\) 2.69 b \\
55 & Methyl hexadecanoate & 31.74 & 1926 & N.d & \(12.16\pm 1\) b & \(50.61\pm 2.12\) a & N.d \\
56 & Dibutyl phthalate & 32.62 & 1965 & \(53.48\pm 0.98\) c & 90.26 \(\pm\) 0.07 b & 213.87 \(\pm\) 1.48 a & 95.65 \(\pm\) 3.36 b \\
57 & Ethyl hexadecanoate & 33.38 & 1993 & \(31.37\pm 0.29\) c & 71.89 \(\pm\) 1.56 b & \(74\pm\) 1.72 b & 92.84 \(\pm\) 1.69 a \\
58 & (\(E\))-2-Hexenyl- & 17.43 & 1391 & N.d & \(46.23\pm 1.31\) c & 95.82 \(\pm\) 4.6 a & 59.72 \(\pm\) 0.63 b \\
59 & Delta-decalactone & 20.48 & 1495 & \(488.87\pm 7.27\) b & \(449.06\pm 0.77\) b & \(253.4\pm 5.09\) c & 1555.69 \(\pm\) 36.95 \\  & & & & & & & \\  & & & & & & & \\  & & & & & & & \\  & & & & & &  
Figure 4B shows the distribution of various volatile compound categories under four different light irradiation treatments. In particular, the MBL treatment had a notably higher alcohol content than the other treatments. Geraniol and phenylethyl alcohol levels were highest in the MBL treatment, attaining 1613.60 \(\pm\) 3.57 \(\upmu\)g/kg and 1003.42 \(\pm\) 0.9 \(\upmu\)g/kg, respectively. Linalool levels peaked at 415.93 \(\pm\) 0.85 \(\upmu\)g/kg in the  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**No. **} & \multirow{2}{*}{**Name**} & \multirow{2}{*}{**Rt**} & \multirow{2}{*}{**RI**} & \multicolumn{6}{c}{**Content (\(\upmu\)g/kg, DW)**} \\ \cline{5-8}  & & & & **HBL** & **MBL** & **LBL** & **DARK** \\ \hline \multicolumn{8}{c}{**Hydrocarbons**} \\ \hline
83 &
\begin{tabular}{c} 2,3-Dimethyl- \\ undecane \\ 2,6,11- Trimethyl- \\ dodecane \\ 85 \\ 86 \\ 87 \\ 88 \\ 89 \\ 88 \\ 89 \\ 90 \\ 91 \\ 91 \\ 92 \\ 93 \\ 93 \\ 94  
MBL treatment and dropped to 175.16 \(\pm\) 4.36 \(\upmu\)g/kg in the DARK treatment. In the DARK treatment, esters and acids had the highest contents, measuring 2275.36 \(\pm\) 21.95 \(\upmu\)g/kg and 298.14 \(\pm\) 2.72 \(\upmu\)g/kg, respectively. Aldehydes, which play a crucial role in tea aroma, were found in concentrations ranging from 1217.62 \(\pm\) 14.12 \(\upmu\)g/kg in the MBL treatment to 148.88 \(\pm\) 0.75 \(\upmu\)g/kg in the DARK treatment. In the HBL treatment, the levels of ketones and other compounds were the highest, measuring 1301.51 \(\pm\) 7.73 \(\upmu\)g/kg and 444.96 \(\pm\) 1.73 \(\upmu\)g/kg, respectively. Heterocyclic compounds showed a marked difference in distribution, varying from 1465.24 \(\pm\) 2.82 \(\upmu\)g/kg under MBL treatment to 990.09 \(\pm\) 4.26 \(\upmu\)g/kg under DARK treatment. The highest levels of hydrocarbon levels were found in the DARK (3780.83 \(\pm\) 28.06 \(\upmu\)g/kg), followed by LBL (3039.02 \(\pm\) 32.82 \(\upmu\)g/kg), MBL (2917.03 \(\pm\) 29.38 \(\upmu\)g/kg), and HBL (1503.98 \(\pm\) 23.40 \(\upmu\)g/kg).