## 3 Results and Discussions
### Volatile Profile of the Mastic Gum Samples
#### 3.2.1 Monoterpenes
\begin{table}
\begin{tabular}{l l l l l l l l} \hline  & & & \multicolumn{4}{c}{**Concentration (ug/kg) 2**} \\ \cline{4-9}
**No** & **LRI 1** & **Aroma Compounds** & **MGT** & **MGG** & **\(p\)3** & **Identification 4** \\ \hline \multirow{2}{*}{1} & \multirow{2}{*}{1011} & \multirow{2}{*}{1011} & \multirow{2}{*}{\(\alpha\)-Pinene} & 2179.05 \(\pm\) 126.24 & 4417.56 \(\pm\) 422.71 & **\(\ast\)** & LRI, MS, std \\
2 & 1057 & Camphene & 3.43 \(\pm\) 0.08 & 30.28 \(\pm\) 2.68 & **\(\ast\)** & LRI, MS, std \\
3 & 1096 & \(\beta\)-Pinene & 82.51 \(\pm\) 7.85 & 134.98 \(\pm\) 117.77 & **\(\ast\)** & LRI, MS, std \\
4 & 1113 & Sabienne & 13.23 \(\pm\) 0.38 & 20.74 \(\pm\) 0.51 & **\(\ast\)** & LRI, MS, std \\
5 & 1167 & \(\beta\)-Mycene & 1448.49 \(\pm\) 76.38 & 1056.05 \(\pm\) 91.49 & **\(\ast\)** & LRI, MS, std \\
6 & 1196 & Limonene & 72.6 \(\pm\) 6.98 & 73.13 \(\pm\) 5.96 & ns & LRI, MS, std \\
7 & 1212 & \(\beta\)-Phellandrene & 4.25 \(\pm\) 0.42 & 3.06 \(\pm\) 0.22 & **\(\ast\)** & LRI, MS, std \\
8 & 1265 & \(p\)-Cymene & 1.93 \(\pm\) 0.18 & 6.1 \(\pm\) 0.43 & **\(\ast\)** & LRI, MS, std \\
9 & 1431 & Perillene & 44.51 \(\pm\) 2.43 & 14.62 \(\pm\) 0.6 & **\(\ast\)** & LRI, MS, std \\
10 & 1666 & Citral & 9.34 \(\pm\) 0.25 & 59.23 \(\pm\) 3.83 & **\(\ast\)** & LRI, MS, std \\
11 & 1679 & (\(Z\))-Verbeneo & 2.75 \(\pm\) 0.14 & nd & **\(\ast\)** & LRI, MS, std \\  & & **Total** & **3862.1** & **5815.8** & & \\ \hline \multicolumn{9}{c}{**Monoterpenoids**} \\
12 & 1497 & Linalool & 4.65 \(\pm\) 0.3 & 44.71 \(\pm\) 3.44 & **\(\ast\)** & LRI, MS, std \\
13 & 1648 & Myrtrenal & 0.62 \(\pm\) 0.03 & 11.69 \(\pm\) 0.55 & **\(\ast\)** & LRI, MS, tent \\
14 & 1651 & (\(E\))-Pinocavedel & 3.56 \(\pm\) 0.31 & 33.76 \(\pm\) 2.9 & **\(\ast\)** & LRI, MS, std \\
15 & 1669 & (\(E\))-Verbenol & 4.89 \(\pm\) 0.39 & 85.06 \(\pm\) 1.02 & **\(\ast\)** & LRI, MS, std \\
16 & 1763 & Myrtrenal & 0.47 \(\pm\) 0.02 & 16.66 \(\pm\) 0.27 & **\(\ast\)** & LRI, MS, tent \\
17 & 1830 & (\(E\))-Anethehole & 5.66 \(\pm\) 0.09 & 7.51 \(\pm\) 0.04 & **\(\ast\)** & LRI, MS, std \\
18 & 1836 & (\(E\))-Carveol & nd & 13.01 \(\pm\) 1.3 & **\(\ast\)** & LRI, MS, std \\
19 & 1985 & Perilla alcohol & 2.49 \(\pm\) 0.04 & 3.84 \(\pm\) 0.18 & **\(\ast\)** & LRI, MS, std \\  & **Total** & **22.34** & **216.24** & & \\ \hline \multicolumn{9}{c}{**Sesquiterpenenes**} \\
20 & 1585 & \(\beta\)-Caryophyllene & 66.42 \(\pm\) 3.66 & 25.07 \(\pm\) 0.47 & **\(\ast\)** & LRI, MS, std \\
21 & 1667 & \(\alpha\)-Humulene & 4.59 \(\pm\) 0.45 & nd & **\(\ast\)** & LRI, MS, std \\  & **Total** & **71.01** & **25.07** & & \\ \hline \multicolumn{9}{c}{**Sesquiterpene oxide**} \\
22 & 1953 & \multicolumn{3}{l}{Caryophyllene oxide} & 8.74 \(\pm\) 0.41 & 12.08 \(\pm\) 1.2 & \(\ast\) & LRI, MS, std \\  & **Total** & **8.74** & **12.08** & & \\ \hline \multicolumn{9}{c}{**Diterpenoid**} \\
23 & 2551 & \multicolumn{3}{l}{Geranyl linalool} & 2.95 \(\pm\) 0.16 & 12.57 \(\pm\) 0.18 & **\(\ast\)** & LRI, MS, std \\  & **Total** & **2.95** & **12.57** & & \\ \hline \multicolumn{9}{c}{**Alcohols**} \\
24 & 1036 & \multicolumn{3}{l}{2-Methyl-3-butten-2-ol} & 10.74 \(\pm\) 0.63 & 36.06 \(\pm\) 0.95 & **\(\ast\)** & LRI, MS, std \\
25 & 1152 & \multicolumn{3}{l}{3-Pententn-2-ol} & 2.48 \(\pm\) 0.23 & 69.34 \(\pm\) 4.42 & **\(\ast\)** & LRI, MS, std \\
26 & 1226 & \multicolumn{3}{l}{2-Hexanol} & 1.42 \(\pm\) 0.01 & 21.33 \(\pm\) 1.96 & **\(\ast\)** & LRI, MS, std \\
27 & 1322 & \multicolumn{3}{l}{2-Methyl-2-butten-1-ol} & nd & 5.2 \(\pm\) 0.12 & **\(\ast\)** & LRI, MS, std \\
28 & 1480 & \multicolumn{3}{l}{2-Ethyehenanol} & nd & 6.46 \(\pm\) 0.34 & **\(\ast\)** & LRI, MS, std \\  & **Total** & **14.64** & **138.39** & & \\ \hline \multicolumn{9}{c}{**Volatile phenols**} \\
29 & 1390 & \multicolumn{3}{l}{2-Methylanisole} & 25.69 \(\pm\) 1.48 & 54.98 \(\pm\) 4.04 & **\(\ast\)** & LRI, MS, std \\
30 & 2126 & \multicolumn{3}{l}{Methyl isoequenol} & nd & 2.33 \(\pm\) 0.09 & **\(\ast\)** & LRI, MS, tent.