## 4 Conclusions
; writing--original draft preparation, M.W., D.P., M.A.R. ; writing--review and editing, M.W., D.P., C.N. and E.A. ; visualization, M.W. and D.P. ; supervision, C.N. and E.A. ; project administration, C.N. and E.A. ; funding acquisition, C.N. and E.A. All authors have read and agreed to the published version of the manuscript. This research received no external funding. Not applicable. Many thanks are given to Ester Sales for providing the samples. Thanks are also given to Gobierno de Aragon and Fondo Social Europeo for the financial help given to GUIA group T53_20R. The authors declare no conflict of interest. \begin{tabular}{c c c c c} \hline \hline
**No** &
\begin{tabular}{c} **tR** \\ **(min)** \\ \end{tabular} & **Compound * & **CAS** & **Structure** & **KI** \\ \hline
4 & 7.81 & carbonic acid decyl nonyl ester & 1000383-15-8 & 1146 \\
5 & 7.90 & docosyl octyl ether & 1000406-38-9 & 1150 \\
6 & 7.91 & hexyl pentyl ether & 32357-83-8 & 1150 \\
7 & 8.03 & 3,8-dimethyldecane & 17312-55-9 & 1155 \\
8 & 8.031 & 2-propyl-1-heptanol & 10042-59-8 & 1156 \\
9 & 8.95 &
\begin{tabular}{c} N,N-bis(2,4-dimethylphenyl)- \\ acetamide \\ \end{tabular} & 52812-80-3 & 1197 \\
10 & 8.95 &
\begin{tabular}{c} lysozyme \\ \end{tabular} & 478-94-4 & 1197 \\
11 & 9.73 & 1-iodo-dodecane & 4292-19-7 & 1238 \\
12 & 10.29 & dodecane & 112-40-3 & 1268 \\
13 & 10.47 & 3,8-dimethyl-undecane & 17301-30-3 & 1278 \\
14 & 10.59 & 4-ethyl-undecane & 17312-59-3 & 1285 \\
15 & 10.71 & 2,3,7-trimethyl-decane & 62238-13-5 & 1291 \\
16 & 10.84 & 5-ethyl-5-methyl-decane & 17312-74-2 & 1298 \\
17 & 11.04 & 2,3,6-trimethyl-decane & 62238-12-4 & 1311 \\
18 & 11.18 & 5-ethyl-undecane & 17453-94-0 & 1319 \\
19 & 11.29 & 3,5-dimethyl-piperidine & 35794-11-7 & 1326 \\
20 & 11.41 & 4,8-dimethyl-undecane & 17301-33-6 & 1334 \\
21 & 11.97 & tridecane & 629-50-5 & 1369 \\
22 & 12.13 & docosyl nonyl ether & 1000406-37-9 & 1379 \\
23 & 12.33 & 11-methyldodecanol & 85763-57-1 & 1392 \\
24 & 12.33 & 6-ethyl-3-octyl ester chloroacetic acid & 1000279-99-8 & 1392 \\
25 & 12.33 & 2-heptyl-3-methyloxirane & 54125-39-2 & 1392 \\
26 & 12.33 & 2-hexyl-1-decanol & 2425-77-6 & 1392 \\ \hline \hline \end{tabular} \begin{tabular}{c c c c c c} \hline \hline
**No** &
\begin{tabular}{c} **ttR** \\ **(min)** \\ \end{tabular} & **Compound *** & **CAS** & **Structure** & **KI** \\ \hline
27 & 12.34 & decyl ether & 2456-28-2 & 1392 \\
28 & 12.42 & 1,1,4-trimethyl-cyclohexane & 7094-27-1 & 1398 \\
29 & 12.47 & n-tridecan-1-ol & 112-70-9 & 1401 \\
30 & 12.47 & 1-hexadecanol & 36653-82-4 & 1401 \\
31 & 12.59 & 1,2,4-trimethyl-cyclohexane & 2234-75-5 & 1410 \\
32 & 12.59 & 6-ethyl-3-octyl ester & 147-93-3 & 1410 \\
33 & 12.59 & 1,1-dimethyl-2-propyl-cyclohexane & 81983-71-3 & 1410 \\
34 & 12.60 & hexyl octyl ether & 17071-54-4 & 1410 \\
35 & 12.60 & diedecyl ester decanediolic acid & 2432-89-5 & 1410 \\
36 & 12.61 & 6-ethyloct-3-yl ethyl ester oxalic acid & 1000309-33-9 & 1411 \\
37 & 12.81 & 6-methyl-5-hepten-2-one & 100-93-0 & 1426 \\
38 & 12.82 & 3-(3,4-dimethoxyyphenyl)-6-nitro-cumarin & 331949-94-1 & 1426 \\
39 & 12.81 & 2-isopropyl-5-methyl-1-heptanol & 91337-07-4 & 1426 \\
40 & 12.91 & 2-methyl-tridecane & 1560-96-9 & 1433 \\
41 & 12.98 & decyl undecyl ester carbonic acid & 1000383-16-0 & 1439 \\
42 & 13.09 & 1-iodo-tetradecane & 19218-94-1 & 1446 \\
43 & 13.24 & 2,2,3,3,5,6,6-heptamethyl-heptane & 7225-67-4 & 1458 \\
44 & 13.46 & decyl dodecyl ester carbonic acid & 1000383-16-1 & 1474 \\
45 & 13.58 & tetradecane & 629-59-4 & 1482 \\
46 & 13.67 & eicosyl nonyl ether & 1000406-37-8 & 1489 \\
47 & 13.80 & 2-tetradecyl ester methoxyacetic acid & 1000282-04-8 & 1499 \\
48 & 13.92 & heptyl isobutyl ketone & 19594-40-2 & 1508 \\
49 & 13.92 & 2-methyl-tetratetradecane & 1560-95-8 & 1508 \\ \hline \hline \end{tabular}