# Internet of Food (IoF), Tailor-Made Metal Oxide Gas Sensors to Support Tea Supply Chain
## Appendix A
\begin{table}
\begin{tabular}{c c} \hline \hline
**RT** & **Compound Name** & **Abundance Mean** \\ \hline
1.073 & Cyclopropyl methyl carbinol & 120,514 \\
3.273 & Hexanal & 575,125.5 \\
3.405 & Methoxyacetic acid, tridecyl ester & 68,993 \\
3.430 & 3-Tridecene, (Z)- & 68,920 \\
4.183 & 4-Pental, 2-ethyl- & 115,550 \\
4.460 & Sydnone, 3,3\({}^{\prime}\)-trimethylenedi- & 22,564 \\
5.214 &.beta.-Myrcene & 1,018,173.5 \\
5.260 &.beta.-Myrcene & 619,254 \\
5.490 & Ethanol, 2-[2-(4-pyridyl)ethylamino]- & 42,808 \\
5.921 & Cyclohexene, 4-ethenyl-1,4-dimethyl- & 639,379 \\
6.702 & 5-Aminoisoxazole & 42,411 \\
6.706 & 3-Hexanal, (Z)- & 364,986 \\
7.009 & N-(Trifluoroacetyl)-N,O,O’,O’-tetrakis(trimethylsilyl))norepinephrinephrine & 118,904 \\
7.601 &.beta.-Cpinene & 110,410 \\
7.615 &.alpha.-pinene & 433,550 \\
8.170 & 3-Carene & 119,228 \\
8.215 & Tricyclo[2.2.1.0(2,6)]heptane, 1,7,7-trimethyl- & 156,509 \\
8.229 &.beta.-Ocimene & 630,021 \\
8.464 & Dodecane, 4,6-dimethyl- & 129,460 \\
8.475 & Undecane, 3,8-dimethyl- & 507,030 \\
10.385 & trans,cis-2,6-Nonadienyl acetate & 34,989 \\
10.467 & Tricocaine, 6-methyl- & 210,574 \\
10.497 & Nonane, 4,5-dimethyl- & 37,215 \\
10.734 & Dodecane, 4,6-dimethyl- & 338,715.5 \\
11.000 & 3-Hepten-1-ol, (Z)- & 226,106 \\
11.151 & 3-Ethyl-3-methylheptane & 239,089 \\
11.425 & cis-Acontic anhydride & 27,787 \\
11.556 & 4-Heptafluorobutyricoxytridecane & 524,738 \\
11.586 & Nonane, 4,5-dimethyl- & 150,122 \\
11.930 & 5-Hepten-2-one, 6-methyl- & 378,933 \\
12.318 & 2-Isopropyl-5-methyl-1-heptanol & 195,059 \\
12.323 & Oxalic acid, allyl octadecyl ester & 89,397 \\
12.380 & l-Alanine, N-(cyclohexylcarbonyl)-, heptadecyl ester & 37,359 \\
14.688 & Nonanal & 113,348 \\
15.129 & 1-Methoxy-3-hydroxymethylheptane & 119,355 \\
15.620 & Heptadecane, 2,6,10,14-tetramethyl- & 65,889 \\
15.635 & Tridecane & 183,448 \\
16.195 & 3-Undecene, (Z)- & 63,096 \\
16.220 & 2-Nonneal, (Z)- & 147,528 \\
16.460 & 2-(3-Bromopropyl)-[1,3]dioxolane & 28,267 \\
18.280 & Ammonium acetate & 187,763 \\
18.330 & Methoxyacetic acid, hexyl ester & 48,206 \\
18.390 & 1,4-Hexadiene, 5-methyl- & 261,153 \\
18.429 & Cyclohexan-1,4,5-triol-3-one-1-carboxylic acid & 619,199 \\
18.661 & Furfurral & 345,710 \\
19.005 & Methoxyacetic acid, 2-tricolyl ester & 57,046 \\
19.022 & Nonane, 3-methyl-5-propyl- & 417,744 \\
19.055 & Nonane, 4,5-dimethyl- & 72,220 \\
19.600 & Butane, 1-(ethenyloxy)- & 23,034 \\
19.715 & 2,3-Hexadiene, 2-methyl- & 388,031 \\
20.635 & 2-Propyl-1-pentanol & 135,168 \\
21.037 & Benzaldehyde & 246,318 \\
21.250 & Undecane, 3,6-dimethyl- & 147,124 \\
21.466 & R-Limonene & 197,652 \\
21.730 & Pyrrolidine-2,4-dione & 21,913 \\
21.764 & Dodecane, 2,6,11-trimethyl- & 130,862 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Results for the SGP sample fingerprint determination with indication of the retention time (RT) and abundance mean for every identified compound. \begin{table}
\begin{tabular}{c c c} \hline
**RT** & **Compound Name** & **Abundance Mean** \\ \hline
21.770 & Decane, 2-methyl- & 37,031 \\
22.158 & 1,5-Heptadiene, 2,3,6-trimethyl- & 635,307.5 \\
23.267 & 6-Octen-1-ol, 3,7-dimethyl-, acetate & 589,174 \\
23.301 & Cyclopropanemethanol, alpha,2-dimethyl-2-(4-methyl-3-pentenyl)-, [1.alpha.(R*),2.alpha.