## 3 Results
### Volatile Organic Compound Profile
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \(\mathbf{N}^{\circ}\) & **Compound** & **Formula** & **CAS** & **Sample 1** & **(\%) Area** & **Sample 2** & **(\%) Area** & **Reference** \\ \hline \multicolumn{8}{c}{**Fatty acid**} \\ \hline
1 & 9-octadecenoic acid & C\({}_{18}\)H\({}_{34}\)O\({}_{2}\) & 112-79-8 & X & 1.72 & X & 5.70 & [38] \\
2 & Decanoic acid & C\({}_{10}\)H\({}_{20}\)O\({}_{2}\) & 3344-85 & ND & & X & 3.51 & [20] \\
3 & 3-hydroxydecanoic acid & C\({}_{12}\)H\({}_{20}\)O\({}_{3}\) & 1883-13-2 & ND & & X & 0.73 & [20] \\
4 & Dodecanoic acid & C\({}_{12}\)H\({}_{20}\)O\({}_{2}\) & 143-07-7 & ND & & X & 0.65 & [20] \\
5 & Cyclopropanet tetradecanoic acid & C\({}_{26}\)H\({}_{30}\)O\({}_{2}\) & 27198-62-5 & X & 1.19 & ND & & [20] \\
6 & Eicosanoic acid & C\({}_{20}\)H\({}_{20}\)O\({}_{2}\) & 506-30-9 & X & 0.79 & ND & & [20] \\
7 & Oleic acid & C\({}_{18}\)H\({}_{34}\)O\({}_{2}\) & 112-80-1 & X & 4.46 & ND & & [20] \\
8 & Hexadecanoic acid ethyl ester & C\({}_{18}\)H\({}_{38}\)NO\({}_{2}\) & 658-97-7 & ND & & X & 10.61 & [20] \\ \hline \multicolumn{8}{c}{**Organic acid**} \\ \hline
9 & Acetic acid & C\({}_{2}\)H\({}_{4}\)O\({}_{2}\) & 64-19-7 & X & 25.68 & X & 39.23 & - \\
10 & Benzene acetic acid & C\({}_{8}\)H\({}_{8}\)O\({}_{2}\) & 103-82-2 & X & 12.33 & X & 3.58 & - \\
11 & Benzoic acid & C\({}_{7}\)H\({}_{6}\)O\({}_{2}\) & 65-85-0 & X & 4.35 & X & 1.50 & - \\
12 & 3-methyl-butanoate acid & C\({}_{6}\)H\({}_{10}\)O\({}_{2}\) & 503-74-2 & X & 3.38 & ND & & - \\
13 & Nonanoic acid & C\({}_{4}\)H\({}_{10}\)O\({}_{2}\) & 112-05-0 & X & 2.24 & X & 4.43 & - \\
14 & Phthalic acid & C\({}_{8}\)H\({}_{6}\)O\({}_{4}\) & 88-99-3 & X & 3.03 & ND & & - \\
15 & Propanoic acid & C\({}_{3}\)H\({}_{6}\)O\({}_{2}\) & 79-09-4 & X & 0.77 & X & 0.68 & - \\ \hline \multicolumn{8}{c}{**Alcohol**} \\ \hline
16 & 1-hexanol-2-ethyl & C\({}_{8}\)H\({}_{18}\)O & 104-76-7 & X & 0.86 & ND & & [20] \\
17 & Butane-2,3-diol & C\({}_{4}\)H\({}_{10}\)O\({}_{2}\) & 513-85-9 & X & 7.94 & X & 4.95 & [20] \\
18 & 2-dodecanol & C\({}_{2}\)H\({}_{20}\)O & 10203-28-8 & X & 1.95 & ND & & [20] \\
19 & Phenylethyl alcohol & C\({}_{8}\)H\({}_{10}\)O & 60-12-8 & X & 1.84 & X & 1.00 & [20] \\ \hline \multicolumn{8}{c}{**Aldehyde**} \\ \hline
20 & 5-methyl-2-phenyl-2-hexneal & C\({}_{13}\)H\({}_{16}\)O & 21834-92-4 & ND & & X & 0.61 & [38] \\
21 & Benzene acetaldehyde & C\({}_{8}\)H\({}_{8}\)O & 122-78-1 & X & 1.19 & ND & & [38] \\
22 & Benzaldehyde & C\({}_{7}\)H\({}_{6}\)O & 100-52-7 & ND & & X & 1.52 & [38] \\
23 & Nonanal & C\({}_{9}\)H\({}_{8}\)O & 124-19-6 & X & 13.16 & X & 13.89 & [38] \\
24 & 3-methyl hexanal & C\({}_{7}\)H\({}_{4}\)O & 19269-28-4 & ND & & X & 0.94 & [38] \\ \hline \multicolumn{8}{c}{**Ketone**} \\ \hline
25 & Acetion & C\({}_{4}\)H\({}_{8}\)O\({}_{2}\) & 513-86-0 & X & 1.35 & ND & & [20] \\
26 & Ethanone & C\({}_{2}\)H\({}_{2}\)O & X & 1.66 & X & 0.62 & [20] \\ \hline \multicolumn{8}{c}{**Benzoic acid derivatives**} \\ \hline
27 & 1-2-4-enzenetricarboxylic acid & C\({}_{9}\)H\({}_{6}\)O\({}_{6}\) & 528-4-9 & X & 1.27 & ND & & [38] \\
28 & 2-5-dihydroxybenzaldehyde & C\({}_{7}\)H\({}_{6}\)O\({}_{3}\) & 1194-98-5 & X & 0.65 & ND & & [38] \\ \hline \multicolumn{8}{c}{**Ester**} \\ \hline
29 & Acetic acid-2-phenylethyl-ester & C\({}_{10}\)H\({}_{2}\)O\({}_{2}\) & 103-45-7 & X & 2.68 & X & 1.30 & [39] \\
30 & Hexadecanoic acid methyl ester & C\({}_{17}\)H\({}_{34}\)O\({}_{2}\) & 112-39-0 & ND & & X & 0.98 & [39] \\ \hline \multicolumn{8}{c}{**Phenylpropanol**} \\ \hline
31 & N-benzyl-2-aminobenzanamate & C\({}_{17}\)H\({}_{17}\)NO\({}_{2}\) & 18429-69-1 & X & 2.20 & ND & & - \\ \multicolumn{8}{c}{**Pyrazine**} \\ \hline
32 & Pyrazine tetramethyl & C\({}_{8}\)H\({}_{12}\)N\({}_{2}\) & 1124-11-4 & X & 0.91 & ND & & [40] \\
33 & Pyrazine & C\({}_{4}\)H\({}_{4}\)N\({}_{2}\) & 290-37-9 & ND & & X & 3.58 & [40] \\ \hline \multicolumn{8}{c}{**Others**} \\ \hline
34 & 4H-pyraz-4-2-3 dihydro & C\({}_{5}\)H\({}_{6}\)O\({}_{2}\) & 28564-83-2 & X & 1.93 & ND & - \\
35 & 3H-pyrazzol-3-one, & C\({}_{10}\)H\({}_{10}\)N\({}_{2}\)O & 89-25-8 & X & 0.48 & ND & - \\ \hline \multicolumn{8}{c}{X = Compound identified; ND = Not identified.} \\ \hline \hline \end{tabular}
\end{table}