# Comparison of the Chemical and Sensorial Evaluation of Dark Chocolate Bars
## 3 Results and Discussion
### Headspace Compositions
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Compounds**} & \multirow{2}{*}{**l.r.i. 1**} & \multicolumn{6}{c}{**Relative Abundance (\%)**} \\  & & **HD1** & **HD2** & **HD3** & **HD4** & **HD5** & **HD6** & **HD7** & **HD8** \\ \hline
2-phenylethylacetate & 1258 & 3.4 & 2.9 & 2.1 & 4.6 & 3.6 & 4.2 & 2.6 & 12.2 \\ nonanoic acid & 1273 & 2.5 & 3.6 & - & - & - & 1.1 & 0.2 & 0.3 \\ (\(E\))-anethole & 1287 & - & - & 6.2 & 1.1 & - & - & 1.2 & - \\
2-undecanone & 1294 & - & - & - & 0.1 & - & 0.4 & - & - \\ \(n\)-tridecane & 1300 & - & - & - & - & 0.6 & - & 0.2 & - \\ undecanal & 1305 & - & - & - & 0.2 & - & - & - & - \\ \(\delta\)-elemene & 1340 & - & - & - & - & - & - & 0.1 & - \\ \(\alpha\)-terpinyl acetate & 1351 & - & - & - & - & - & 0.3 & - & - \\ \(\alpha\)-copaene & 1376 & 0.6 & - & - & - & - & - & 0.2 & - \\ \(\beta\)-patchoulene & 1380 & - & - & - & - & - & - & - & 2.3 \\ ethyl decanoate & 1396 & - & - & - & - & 0.5 & - & - & - \\ \(n\)-tetradecane & 1400 & - & - & 1.3 & - & 0.6 & - & - & - \\ longifolene & 1403 & - & - & - & - & - & - & 0.2 & - \\ methyl eugenol & 1404 & - & - & - & - & - & 0.3 & - & - \\ (Z)-caryophyllene & 1405 & - & - & - & - & - & - & 0.2 & - \\ \(\beta\)-duprezianene & 1423 & - & - & - & - & - & - & - & 1.1 \\ (\(E\))-geranyl acetone & 1454 & 1.0 & 1.4 & 0.5 & 0.3 & 0.4 & 0.8 & 0.3 & 2.6 \\ \(\alpha\)-patchoulene & 1456 & - & - & - & - & - & - & 0.2 & - \\ _allo_aromodendrene & 1461 & - & - & - & - & - & 0.5 & - & - \\ drima-7,9(11)-diene & 1470 & - & - & - & - & - & - & - & 1.3 \\
1-dodecanol & 1471 & - & 3.2 & - & - & - & - & - & - \\ _trans_-cadina-1(6),4-diene & 1475 & - & - & - & - & - & - & - & 1.9 \\ germacrene D & 1480 & - & - & - & - & - & - & 0.5 & - \\ _cis_-\(\beta\)uaieene & 1489 & - & - & - & - & - & - & 0.2 & - \\ bicyclogermacrene & 1495 & - & - & - & - & - & 0.5 & - & - \\ _trans_-\(\beta\)-guaiene & 1501 & 0.4 & - & 0.6 & - & - & 0.5 & 0.5 & - \\ _trans_-\(\gamma\)-cadinene & 1513 & - & - & - & - & - & - & 0.4 & - \\ \(\delta\)-cadinene & 1523 & - & - & 0.6 & - & - & - & 0.5 & - \\ ethyl dodecanoate & 1595 & - & - & 0.2 & 0.1 & - & - & 0.2 & 0.8 \\ \(n\)-hexadecane & 1600 & - & - & 0.2 & - & - & - & - & - \\ citronellyl pentanoate & 1625 & - & - & 0.8 & - & - & - & - & - \\ cadalene & 1675 & 1.9 & 2.5 & 1.0 & - & - & - & 0.4 & - \\ \hline Monoterpene hydrocarbons & & 1.6 & 7.2 & 0.2 & - & - & - & 1.0 & - \\ Oxygenated monoterepenes & & 0.1 & - & 0.8 & 0.1 & 0.2 & 1.0 & 0.4 & - \\ Sesquireerend hydrocarbons & & 2.9 & 2.5 & 2.2 & - & - & 1.5 & 3.4 & 6.7 \\ Pyrazines & 66.6 & 56.4 & 56.3 & 74.2 & 69.0 & 71.3 & 69.9 & 65.6 \\ Pyrroles & 3.2 & 2.3 & 0.8 & - & - & - & - & - \\ Apocarotenoids & 1.0 & 1.4 & 0.5 & 0.3 & 0.4 & 1.1 & 0.3 & 2.6 \\ Phenylpropanoids & - & - & 7.2 & 1.1 & - & - & 1.2 & - \\ Non-terpene acids & 5.2 & 3.6 & 2.5 & 1.3 & - & 1.1 & 3.2 & 0.8 \\ Non-terpene alcohols & 6.4 & 10.6 & 6.6 & 3.6 & 9.6 & 3.4 & 7.5 & 1.9 \\ Non-terpene aldehydes & 8.8 & 7.4 & 1.9 & 1.8 & 3.7 & 0.7 & 2.4 & 0.4 \\ Non-terpene esters & 4.3 & 8.5 & 16.6 & 17.5 & 14.7 & 19.5 & 9.4 & 22.1 \\ Non-terpene ketones & - & - & - & 0.1 & 1.2 & 0.4 & 1.0 & - \\ Non-terpene hydrocarbons & - & - & 4.4 & - & 1.2 & - & 0.2 & - \\ Total identified (\%) & 100.0 & 99.9 & 100.0 & 99.9 & 100.0 & 100.0 & 99.9 & 100.0 \\ \hline \hline \end{tabular}  
* Linear retention indices on a DB5 capillary column. 2 Not detected. Legend of the sample names: the HD code stands for hard discount, followed by a unique number, each identifying one specific commercial sample among this type.  
\end{table} 
Table 2: _Cont._