## 3 Results and Discussion
### Device Extraction Efficiency
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Peak** & **Rt** & **Compound** & **Formula** & **RI** & **Area** & **Area (\%)** \\ \hline
1 & 7.42 & Benzaldehyde & C\({}_{7}\)H\({}_{6}\)O & 970 & 0.05 & 1.14 \\
2 & 9.13 & 2-ethyl-1-hexanol & C\({}_{8}\)H\({}_{18}\)O & 1017 & 0.96 & 3.66 \\
3 & 9.46 & benzyl alcohol & C\({}_{7}\)H\({}_{8}\)O & 1025 & 4.42 & 6.70 \\
4 & 13.99 & 1-Undecene & C\({}_{11}\)H\({}_{22}\) & 1136 & 0.24 & 0.48 \\
5 & 14.65 & Benzyl acetate & C\({}_{9}\)H\({}_{10}\)O\({}_{2}\) & 1152 & 10.42 & 69.56 \\
6 & 15.3 & m-Methylphenyl acetate & C\({}_{9}\)H\({}_{10}\)O\({}_{2}\) & 1168 & 0.03 & 0.34 \\
7 & 16.64 & decanal & C\({}_{10}\)H\({}_{20}\)O & 1200 & 0.17 & 0.68 \\
8 & 20.74 & Tridecane & C\({}_{13}\)H\({}_{28}\) & 1300 & 0.05 & 0.24 \\
9 & 21.12 & Undecanal & C\({}_{11}\)H\({}_{22}\)O & 1309 & 0.11 & 0.19 \\
10 & 24.82 & decanoic acid, ethyl ester & C\({}_{12}\)H\({}_{24}\)O\({}_{2}\) & 1400 & 0.12 & 0.20 \\
11 & 25.01 & Tetradecane & C\({}_{14}\)H\({}_{30}\) & 1404 & 0.07 & 0.88 \\
12 & 25.75 & \(\alpha\)-Ionone & C\({}_{13}\)H\({}_{20}\)O & 1422 & 0.16 & 0.12 \\
13 & 26.2 & trans-\(\alpha\)-Bergamotene & C\({}_{15}\)H\({}_{24}\) & 1433 & 0.26 & 0.22 \\
14 & 26.93 & trans-Geranylacetone & C\({}_{13}\)H\({}_{22}\)O & 1451 & 0.26 & 0.32 \\
15 & 27.11 & (E)-\(\beta\)-Farmesene & C\({}_{15}\)H\({}_{24}\) & 1455 & 1.55 & 0.24 \\
16 & 28.08 & \(\beta\)-Ionone & C\({}_{13}\)H\({}_{20}\)O & 1479 & 0.24 & – \\
17 & 28.27 & 1-Pendadecene & C\({}_{15}\)H\({}_{30}\) & 1484 & 0.23 & – \\
18 & 28.68 & 1,3,6,10-Dodecateate, & C\({}_{15}\)H\({}_{24}\) & 1494 & 0.09 & – \\  & & 1,3-Cyclohexadiene, & & & & \\
19 & 28.79 & 5-(1,5-dimethyl-1-4-hexenyl)-2-methyl-1, & C\({}_{15}\)H\({}_{24}\) & 1496 & 0.26 & – \\  & & [S-(R\({}^{\prime}\)S\({}^{\prime}\))]- & & & & \\
20 & 29.13 & Pentadecane & C\({}_{15}\)H\({}_{32}\) & 1505 & 15.49 & 2.58 \\
21 & 29.22 & \(\alpha\)-farmesene & C\({}_{15}\)H\({}_{24}\) & 1507 & 0.47 & – \\
22 & 29.92 & \(\beta\)-Sesquiphthalrene & C\({}_{15}\)H\({}_{24}\) & 1524 & 1.30 & 0.22 \\  & & Propanoic acid, & & & & \\
23 & 32.4 & 2-methyl-1-(1,1-dimethylethylethyl)-2- & C\({}_{16}\)H\({}_{30}\)O\({}_{4}\) & 1584 & 0.11 & 0.20 \\  & & methyl-1,3-propanediyl ester & & & & \\
24 & 33.05 & hexadecane & C\({}_{16}\)H\({}_{34}\) & 1600 & 0.18 & 0.17 \\
25 & 35.59 & 6,9-heptadecadiene & C\({}_{14}\)H\({}_{28}\)O & 1662 & 40.10 & 5.49 \\
26 & 35.71 & 9-Tetradecen-1-ol, (E)- & C\({}_{14}\)H\({}_{28}\)O & 1665 & 0.83 & – \\
27 & 35.89 & 8-heptadecene & C\({}_{14}\)H\({}_{30}\)O & 1670 & 15.27 & 1.80 \\
28 & 36.71 & 2-pentadecanone & C\({}_{15}\)H\({}_{30}\)O & 1690 & 0.51 & – \\
29 & 36.78 & heptadecene & C\({}_{17}\)H\({}_{36}\) & 1691 & 2.23 & 1.75 \\
30 & 37.64 & E,E-10,12-hexadecian & C\({}_{16}\)H\({}_{28}\)O & 1712 & 0.77 & – \\
31 & 37.77 & Z,Z-10,13-hexadecianel & C\({}_{16}\)H\({}_{28}\)O & 1715 & 0.63 & – \\
32 & 43.72 & 2-heptadecanone & C\({}_{17}\)H\({}_{34}\)O & 1861 & 2.21 & 2.32 \\
33 & 50.09 & Eicosane & C\({}_{20}\)H\({}_{42}\) & 2016 & 0.21 & 0.49 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Gas chromatography-mass spectrometry GC-MS analysis of the volatile organic compounds (VOCs) emitted by live water lily. observed in other _Nymphaeaceae_ and _Jasminum_ plants, suggesting that these volatiles may be the key to flower scent and the maturation process. The recycled PET plastic bottle may have absorbed some of the VOCs and also may have released its own components. However, a previous study established that ethanol, limonene, 2-methyl-1,3-dioxolane, acetone, octanal, and nonanal can be detected from a recycled PET bottle using GC-MS. Most of them originated from foods packed in bottles, and only 2-methyl-1,3-dioxolane was derived from polymer impurities [31]. Another paper also reported that PET materials mainly release some phthalic acid esters (PAEs) and plastic additives by hydrophilic solutions [32]. In addition, as the results show in Table 3, we also did not find PAEs or other plastic additives by GC-MS analysis.