## Results and Discussion
### Volatile Compounds of Portuguese Honeys
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline  & & & & \multicolumn{2}{c}{**Eucalyptus**} & \multicolumn{4}{c}{**Chestnut**} & \multicolumn{4}{c}{**Heather**} \\ \cline{4-13}
**RT** & **Compounds (ug/kg)** & **RI\({}_{\text{avg}}\)** & **RI\({}_{\text{lit}}\)** & **Qualification** & **Avg** & **SD** & **Qualification** & **Avg** & **SD** & **Qualification** & **Avg** & **SD** \\ \hline
6.41 & 2,3-Butanedione & \textless{}800 & \textless{}800 & ni & ni \({}^{\text{a}}\) & ni & ni & ni \({}^{\text{a}}\) & ni & 83 & 31.40 \({}^{\text{b}}\) & 3.01 \\ \hline
6.97 & Acetic acid ethyl ester & \textless{}800 & \textless{}800 & ni & ni \({}^{\text{c}}\) & ni & ni & ni \({}^{\text{c}}\) & ni & 91 & 148.94 \({}^{\text{d}}\) & 4.09 \\ \hline
7.73 & 4-methyl-1,3-Pentadiene & \textless{}800 & \textless{}800 & ni & ni \({}^{\text{e}}\) & ni & ni & ni \({}^{\text{e}}\) & ni & 94 & 26.31 \({}^{\text{f}}\) & 1.47 \\ \hline
8.18 & 3-methyl-Butanal & \textless{}800 & \textless{}800 & ni & ni \({}^{\text{a}}\) & ni & ni & ni \({}^{\text{s}}\) & ni & 95 & 115.78 \({}^{\text{s}}\) & 1.05 \\ \hline
8.44 & 2-methyl-Butanal & \textless{}800 & \textless{}800 & ni & ni \({}^{\text{a}}\) & ni & ni & ni \({}^{\text{a}}\) & ni & 89 & 141.01 \({}^{\text{d}}\) & 2.43 \\ \hline
9.32 & Hepane & \textless{}800 & \textless{}800 & ni & ni \({}^{\text{a}}\) & ni & ni & ni \({}^{\text{a}}\) & ni & 87 & 27.9 \({}^{\text{m}}\) & 1.91 \\ \hline
9.51 & 2,5-dimethyl-Furan & \textless{}800 & \textless{}800 & 85 & 210.17 \({}^{\text{o}}\) & 229.79 & ni & ni \({}^{\text{p}}\) & ni & ni & ni \({}^{\text{p}}\) & ni \\ \hline
10.08 & 2,4-5-trimethyl-1,3-Dicoalane & \textless{}800 & \textless{}800 & ni & ni \({}^{\text{q}}\) & ni & 86 & 32.70 \({}^{\text{r}}\) & 6.13 & ni & ni \({}^{\text{q}}\) & ni \\ \hline
10.60 & 2-methyl-2-Butanal & \textless{}800 & \textless{}800 & ni & ni \({}^{\text{a}}\) & ni & 94 & 95.98 \({}^{\text{l}}\) & 12.45 & 86 & 33.17 \({}^{\text{u}}\) & 5.62 \\ \hline
10.77 & dimethyl-Disulphide & \textless{}800 & \textless{}800 & 95 & 23.34 \({}^{\text{r}}\) & 16.31 & 97 & 26.29 \({}^{\text{r}}\) & 7.51 & 96 & 21.68 \({}^{\text{r}}\) & 0.65 \\ \hline
11.40 & methyl-Benzene & \textless{}800 & \textless{}800 & ni & ni \({}^{\text{a}}\) & ni \({}^{\text{a}}\) & ni & ni \({}^{\text{a}}\) & ni & 95 & 99.61 \({}^{\text{r}}\) & 2.04 \\ \hline
11.87 & 1-Octene & \textless{}800 & \textless{}800 & ni & ni \({}^{\text{a}}\) & ni & ni & ni \({}^{\text{a}}\) & ni & 93 & 29.87 \({}^{\text{a}}\) & 0.49 \\ \hline
11.94 & 2,3-Butanedione & \textless{}800 & \textless{}800 & ni & ni \({}^{\text{a}}\) & ni & 83 & 110.53 \({}^{\text{a}}\) & 34.79 & ni & \({}^{\text{a}}\) & ni \\ \hline
12.10 & Octene & 800 & 800 & 95 & 956.00 \({}^{\text{ac}}\) & 592.93 & 93 & 507.77 \({}^{\text{ac}}\) & 228.98 & 95 & 637.85 \({}^{\text{ac}}\) & 32.33 \\ \hline
13.08 & 2-Furancarboxaldehyde & 826 & 835 & ni & ni \({}^{\text{ad}}\) & ni & 95 & 94.21 \({}^{\text{ac}}\) & 43.23 & 95 & 1382.73 \({}^{\text{af}}\) & 55.01 \\ \hline
13.37 & 2-methyl-Butanoic acid ethyl ester & 837 & 846 & ni & ni \({}^{\text{a}}\) & ni & ni \({}^{\text{a}}\) & ni & 92 & 44.05 \({}^{\text{ah}}\) & 8.35 \\ \hline
13.46 & 3-methyl-Butanoic acid ethyl ester & 841 & 839 & ni \({}^{\text{ai}}\) & ni & 80 & 36.56 \({}^{\text{d}}\) & 2.53 & ni & ni \({}^{\text{ai}}\) & ni \\ \hline
13.96 & ethyl-Benzene & 860 & 862 & ni & ni \({}^{\text{ah}}\) & ni & 85 & 12.58 \({}^{\text{ad}}\) & 1.74 & ni \({}^{\text{ai}}\) & ni \\ \hline
14.11 & methoxy-phenyl-Oxime & 865 & - & 83 & 10.70 \({}^{\text{an}}\) & 1.52 & ni & ni \({}^{\text{ai}}\) & ni & 91 & 19.68 \({}^{\text{ah}}\) & 0.76 \\ \hline
14.19 & 1,3-dimethyl-Benzene & 869 & 873 & 94 & 28.82 \({}^{\text{ap}}\) & 11.38 & 88 & 25.43 \({}^{\text{ap}}\) & 5.160 & ni \({}^{\text{ai}}\) & ni \\ \hline
14.20 & 1,4-dimethyl-Benzene & 869 & 877 & ni & ni & ni & ni \({}^{\text{ai}}\) & ni & 92 & 32.84 \({}^{\text{an}}\) & 2.20 \\ \hline
14.63 & Pentanoic acid, ethyl ester & 885 & 904 & ni \({}^{\text{ai}}\) & ni \({}^{\text{ai}}\) & ni & 85 & 28.29 \({}^{\text{ai}}\) & 2.85 & ni & ni \({}^{\text{ai}}\) & ni \\ \hline
14.71 & Nonane & 888 & 900 & 94 & 55.31 \({}^{\text{av}}\) & 1.71 & 96 & 46.50 \({}^{\text{av}}\) & 13  
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**RT**} & \multirow{2}{*}{**Compounds (ug/kg)**} & \multirow{2}{*}{**RI\({}_{\text{mg}}\)**} & \multirow{2}{*}{**RI\({}_{\text{th}}\)**} & \multicolumn{4}{c}{**Eucalyptus**} & \multicolumn{4}{c}{**Chestnut**} & \multicolumn{4}{c}{**Heather**} \\ \cline{3-1  
\begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**RT**} & \multirow{2}{*}{**Compounds (ug/kg/kg)**} & \multirow{2}{*}{**RI\({}_{\text{avg}}\)**} & \multirow{2}{*}{**RI\({}_{\text{fit}}\)**} & \multicolumn{3}{c}{**Reaclypits**} & \multicolumn{3}{c}{**Chestant**} & \multicolumn{3}{c}{**Heather**} \\ \cline{4-11}  & & & & & **Qualification** & **Avg** & **SD** & **Qualification** & **Avg** & **SD** & **Qualification** & **Avg** & **SD** \\ \hline
19-30 & 2-(25,50,5-element)-5-methyl/local-2-2-yl(brown-2-cl(trans-Linaololol) oxide) & 1006 & 1097 & 87 & 122.31 \({}^{\text{max}}\) & 99.09 & 89 & 99.2 \({}^{\text{max}}\) & 8.33 & 91 & 425.57 \({}^{\text{max}}\) & 29.37 \\ \hline
19-38 & (38)-37-dimethyl(b)-1-6-6-6-3-cl & 1090 & 1098 & 96 & 302.94 \({}^{\text{max}}\) & 112.96 & 95 & 101.76 \({}^{\text{max}}\) & 30.33 & ni & ni \({}^{\text{max}}\) & ni \\ \hline
19-47 & Nomanal & 1094 & 1102 & ni & ni \({}^{\text{max}}\) & ni & 82 & 257.63 \({}^{\text{max}}\) & 5.24 & ni & ni \({}^{\text{max}}\) & ni \\ \hline
19-48 & 3-Dimethyl-1,5-7-octuxterna-3-cl & 1094 & 1108 & ni \({}^{\text{max}}\) & ni & ni & ni \({}^{\text{max}}\) & ni & 86 & 2058.89 \({}^{\text{max}}\) & 9.02 \\ \hline
19-95 & Penneylyalcohol & 1117 & 1121 & ni & ni \({}^{\text{max}}\) & ni & ni & 39.32 \({}^{\text{max}}\) & 1.65 & 95 & 189.54 \({}^{\text{max}}\) & 17.28 \\ \hline
20-13 & 2-6-Dimethyl-1,3-5-7-octuxterna-(E,E) & 1126 & 1137 & ni & ni \({}^{\text{max}}\) & ni & ni & ni \({}^{\text{max}}\) & ni & 94 & 31.15 \({}^{\text{max}}\) & 7.31 \\ \hline
20-19 & 3,5-trimethyl-2-Cyclohex-1-one (a-laboratory) & 1129 & 1120 & ni & ni \({}^{\text{max}}\) & ni & ni & 89 & 35.26 \({}^{\text{max}}\) & 0.77 & 91 & 475.51 \({}^{\text{max}}\) & 26.94 \\ \hline
20-241 & 2-Pruncuncatechyle-S,-Februarytetrahydro-a-5-dimethyl-(Lia: aldehyde B) & 1139 & 1154 & ni & ni \({}^{\text{max}}\) & ni & ni & ni \({}^{\text{max}}\) & ni & 80 & 51.82 \({}^{\text{max}}\) & 0.36 \\ \hline
20-54 & 2-6-f/trimethyl-2-cyclohex-1-4-dione (4-Kekeption) & 1146 & 1143 & 96 & 91.70 \({}^{\text{max}}\) & 26.45 & 95 & 37.32 \({}^{\text{max}}\) & 3.73 & 95 & 524.9 \({}^{\text{max}}\) & 28.02 \\ \hline
20-68 & 2-Hydroxy-3,5-5-methyl-5-cyclohex-2-enoeno(2-hydroxy-isophone) & 1152 & 1150 & 92 & 83.63 \({}^{\text{max}}\) & ni & ni & ni \({}^{\text{max}}\) & ni & 96 & 137.52 \({}^{\text{max}}\) & 2.74 \\ \hline
20-78 & 1-Neumand & 1157 & 1156 & 89 & 70.43 \({}^{\text{max}}\) & 36.21 & 89 & 160.79 \({}^{\text{max}}\) & 173.75 & ni & ni \({}^{\text{max}}\) & ni \\ \hline
21-26 & Benonica acid ethyl ester & 1171 & 1170 & ni & ni \({}^{\text{max}}\) & ni & 94 & 81.80 \({}^{\text{max}}\) & 34.23 & 95 & 419.62 \({}^{\text{max}}\) & 29.55 \({}^{\text{max}}\) & 27.56 \\ \hline
21-20 & Octanoic acid ethyl ester & 1178 & 1178 & 96 & 290.21 \({}^{\text{max}}\) & 77.59 & 95 & 266 \({}^{\text{max}}\) & 15.74 & 93 & 250.95 \({}^{\text{max}}\) & 5.76 \\ \hline
21-37 & bicyclo(21-21-pypy-2-2-ol(Oenes)) & 1186 & 1177 & ni & ni \({}^{\text{max}}\) & ni & 90 & 49.46 \({}^{\text{max}}\) & 1.80 & ni & ni \({}^{\text{max}}\) & ni \\ \hline
21-35 & Decanal & 1195 & 1195 & 90 & 40.26 \({}^{\text{max}}\) & 11.19 & 91 & 65.17 \({}^{\text{max}}\) & 8.73 & 91 & 72.10 \({}^{\text{max}}\) & 13.40 \\ \hline
21-16 & 1-methyl-4-(1-propanol-2-ylidene)cyclohex-1-one (a-l-replace) & 12200 & - & ni \({}^{\text{max}}\) & ni & ni & ni \({}^{\text{max}}\) & ni & 92 & 29.21 \({}^{\text{max}}\) & 3.27 \\ \hline
21-82 & 2,6-f/trimethyl-1-5-Cyclohexohex-1-1-carboxaldehyde (Safafan) & 1209 & 1207 & ni \({}^{\text{max}}\) & ni & ni & 94 & 19.99 \({}^{\text{max}}\) & 2.36 & 97 & 73.67 \({}^{\text{max}}\) & 1.32 \\ \hline
21-82 & Naphthalene & 1209 & 1209 & ni & ni \({}^{\text{max}}\) & ni & 87 & 11.57 \({}^{\text{max}}\) & 1.12 & ni  
\begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**RT**} & \multirow{2}{*}{**Compounds (ug/kg)**} & \multirow{2}{*}{**RI\({}_{\text{exp}}\)**} & \multirow{2}{*}{**RI\({}_{\text{lat}}\)**} & \multicolumn{3}{c}{**Coalyptius**} & \multicolumn{3}{c}{**Chestnut**} & \multicolumn{3}{c}{**Heather**} \\ \cl