## Results and Discussion
### Selection of SPME Arrow Fibers
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Compounds**} & \multirow{2}{*}{**ID \({}^{\star}\)**} & \multirow{2}{*}{**KI \({}^{\circ}\)**} & \multirow{2}{*}{**KI \({}^{\circ}\)**} & \multicolumn{4}{c}{**Peak Area (\(\times\) 10\({}^{6}\), mean \(\pm\) SD) \({}^{\ddagger}\)**} \\ \cline{5-8}  & & & & **CWR/PDMS** & **DVB/PDMS** & **PDMS** & **PA** \\ \hline \hline Esters & & & & & & & \\ \hline Ethyl hexanoate & MS, KI & 1239 & 1241 & \(44.46\pm 1.73\) \({}^{\rm a}\) & \(31.23\pm 0.12\) \({}^{\rm b}\) & ND & \(1.96\pm 0.09\) \({}^{\rm c}\) \\ \hline \hline Furans & & & & & & & \\ \hline
2-Methylfuran & MS, KI & 868 & 876 & \(51.30\pm 0.26\) \({}^{\rm a}\) & \(13.97\pm 0.11\) \({}^{\rm b}\) & \(5.04\pm 0.51\) \({}^{\rm c}\) & ND \\ \hline
2-Ethylfuran & MS, KI & 954 & 960 & \(316.11\pm 3.12\) \({}^{\rm a}\) & \(124.42\pm 0.69\) \({}^{\rm b}\) & \(48.70\pm 0.32\) \({}^{\rm c}\) & \(23.52\pm 2.05\) \({}^{\rm d}\) \\ \hline
2-Pentylfuran & MS, KI & 1234 & 1235 & \(1266.54\pm 32.31\) \({}^{\rm a}\) & \(487.03\pm 0.65\) \({}^{\rm b}\) & \(98.17\pm 0.44\) \({}^{\rm c}\) & \(29.81\pm 1.25\) \({}^{\rm d}\) \\ \hline \hline trans-2-(2-Pentenyl)furan & MS & 1300 & & \(33.72\pm 1.16\) \({}^{\rm a}\) & \(20.27\pm 0.03\) \({}^{\rm b}\) & ND & ND \\ \hline \hline Ketones & & & & & & \\ \hline
2-Heptanone & MS, KI & 1184 & 1185 & \(25.74\pm 0.13\) \({}^{\rm a}\) & \(10.68\pm 0.10\) \({}^{\rm b}\) & ND & ND \\ \hline Acetoin & MS, KI & 1283 & 1287 & \(22.56\pm 0.80\) \({}^{\rm a}\) & \(22.71\pm 2.19\) \({}^{\rm a}\) & ND & \(12.63\pm 0.49\) \({}^{\rm b}\) \\ \hline
2,2,6-Trimethylcyclohexanone & MS, KI & 1312 & 1307 & \(50.79\pm 0.53\) \({}^{\rm b}\) & \(53.09\pm 0.31\) \({}^{\rm a}\) & \(11.66\pm 0.17\) \({}^{\rm c}\) & \(3.39\pm 0.09\) \({}^{\rm d}\) \\ \hline
6-Methyl-6-hepten-2-one & MS, KI & 1318 & 1320 & \(72.19\pm 1.10\) \({}^{\rm a}\) & \(37.42\pm 1.18\) \({}^{\rm b}\) & ND & \(8.00\pm 0.15\) \({}^{\rm c}\) \\ \hline
6-Methyl-5-heptene-2-one & MS, KI & 1340 & 1341 & \(161.23\pm 1.83\) \({}^{\rm a}\) & \(118.61\pm 0.30\) \({}^{\rm b}\) & \(14.05\pm 0.41\) \({}^{\rm c}\) & \(8.83\pm 0.10\) \({}^{\rm d}\) \\ \hline
3,5-Octadien-2-one & MS, KI & 1524 & 1516 & \(534.74\pm 0.51\) \({}^{\rm a}\) & \(534.56\pm 15.23\) \({}^{\rm a}\) & \(76.33\pm 0.10\) \({}^{\rm c}\) & \(87.85\pm 3.52\) \({}^{\rm b}\) \\ \hline Ketoisophorone & MS, KI & 1704 & 1708 & ND & \(30.05\pm 1.63\) & ND & ND \\ \hline Nitro, Nitrate & & & & & & \\ \hline
2-Nitropropane & MS & 1202 & & \(49.58\pm 1.11\) \({}^{\rm a}\) & \(25.75\pm 0.07\) \({}^{\rm b}\) & ND & \(11.16\pm 0.18\) \({}^{\rm c}\) \\ \hline
3-Methyl-1-butanol nitrate & MS & 1228 & & \(41.11\pm 0.78\) \({}^{\rm a}\) & \(19.96\pm 0.12\) \({}^{\rm b}\) & ND & ND \\ \hline
1-Nitrobutane & MS, KI & 1291 & 1310 & \(58.69\pm 0.02\) \({}^{\rm a}\) & \(32.46\pm 1.16\) \({}^{\rm b}\) & \(9.84\pm 1.11\) \({}^{\rm c}\) & \(8.71\pm 0.30\) \({}^{\rm d}\) \\ \hline
1-Nitrohexane & MS, KI & 1501 & 1502 & \(108.95\pm 1.00\) \({}^{\rm a}\) & \(90.19\pm 1.70\) \({}^{\rm b}\) & \(15.65\pm 0.31\) \({}^{\rm c}\) & \(15.74\pm 0.04\) \({}^{\rm c}\) \\ \hline Pyrazines & & & & & & \\ \hline Trimethylpyrazine & MS, KI & 1406 & 1413 & \(24.13\pm 2.14\) \({}^{\rm a}\) & \(22.86\pm 0.33\) \({}^{\rm b}\) & ND & ND \\ \hline Tetramethylpyrazine & MS, KI & 1481 & 1467 & \(39.26\pm 2.87\) \({}^{\rm a}\) & \(35.71\pm 2.23\) \({}^{\rm b}\) & \(10.16\pm 0.17\) \({}^{\rm c}\) & ND \\ \hline Terpenes & & & & & & \\ \hline Caryophyllene & MS, KI & 1608 & 1598 & \(81.57\pm 4.56\) \({}^{\rm a}\) & \(30.15\pm 2.80\) \({}^{\rm b}\) & \(17.69\pm 1.67\) \({}^{\rm c}\) & ND \\ \hline \(\beta\)-Cyclocitral & MS, KI & 1622 & 1600 & \(304.70\pm 1.82\) \({}^{\rm c}\) & \(311.87\pm 6.94\) \({}^{\rm b}\) & \(106.14\pm 1.46\) \({}^{\rm c}\) & \(1846.12\pm 56.83\) \({}^{\rm a}\) \\ \hline \(\beta\)-Selinene & MS, KI & 1738 & 1725 & ND & ND & \(23.12\pm 0.45\) & ND \\ \hline Geranylacetone & MS, KI & 1864 & 1865 & ND & \(15.75\pm 0.55\) \({}^{\rm a}\) & \(13.86\pm 0.62\) \({}^{\rm b}\) & ND \\ \hline \(\alpha\)-Ionone & MS, KI & 1868 & 1857 & ND & ND & \(0.05\pm 0.00\) & ND \\ \hline trans-\(\beta\)-Ionone & MS, KI & 1961 & 1954 & \(389.65\pm 1.50\) \({}^{\rm c}\) & \(506.51\pm 24.73\) \({}^{\rm a}\) & \(428.17\pm 24.52\) \({}^{\rm b}\) & \(204.47\pm 24.73\) \({}^{\rm d}\) \\ \hline \(\beta\)-Ionone epoxide &