## 3 Results and Discussion
### Relationship between Coffee Acceptability and Volatile Compounds
#### 3.5.2 Internal Preference Mapping
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**No.** & **Volatile Compounds** & **OverallIIIiking** & \begin{tabular}{c} **Bitterness** \\ **Intensity** \\ \end{tabular} & \begin{tabular}{c} **CoffeeID** \\ **Intensity** \\ \end{tabular} & \
\begin{tabular}{c} **Caffeine** \\ **Chlorogenic acid** \\ \end{tabular} &
\begin{tabular}{c} **Trigonellite** \\ **Trigonellite** \\ \end{tabular} \\ \hline V1 & Pyridine & 0.4051 & 0.4506 & **0.6294** & 0.4009 & \(-\)0.1188 & 0.0673 \\ V2 & Methylpyrazine & \(-\)0.2472 & **0.8086** & 0.4608 & **0.8199** & 0.5801 & **0.6219** \\ V3 & Furufal & **-0.4835** & \(-\)0.1263 & \(-\)0.2608 & \(-\)0.1285 & 0.4423 & 0.3804 \\ V4 & 2-Furan methanol & \(-\)0.0859 & **0.7601** & 0.5833 & **0.7833** & 0.4578 & 0.5857 \\ V5 & 2-6-Dimethylpyrazine & \(-\)0.2948 & **0.8019** & 0.4662 & **0.8076** & **0.6103** & **0.6874** \\ V6 & 3-Ethpyhydrazine & 0.4834 & 0.3109 & 0.5360 & 0.2328 & \(-\)0.3096 & \(-\)0.1300 \\ V7 & 5-Methyl2-2-Haralddehyde & \(-\)**0.48712** & 0.8121 & \(-\)0.1314 & 0.1091 & 0.5790 & 0.5186 \\ V8 & Phenol & 0.1530 & **0.6796** & 0.7254 & **0.6269** & 0.1019 & 0.2635 \\ V9 & 2-ethyl-3-methylpyrazine & \(-\)0.1883 & **0.7410** & 0.4601 & **0.7540** & 0.4611 & 0.5144 \\ V10 & Pyroze-2-carboxaldehyde & \(-\)0.3690 & 0.5661 & 0.5806 & 0.5901 & 0.5247 & **0.6039** \\ V11 & 1-methyl-HYP-2-acetonitrile & \(-\)0.4306 & **0.6318** & 0.2799 & **0.6562** & **0.6218** & **0.6296** \\ V12 & Na-x-x-4(H)-Pyrimidine & \(-\)0.1002 & **0.8564** & 0.5421 & **0.8420** & 0.4702 & 0.5520 \\ V13 & 3-Methylphenol & **0.6201** & 0.1255 & 0.3068 & 0.1737 & \(-\)0.2674 & \(-\)0.1545 \\ V14 & 2-Acetylpyrrole & 0.0736 & **0.7221** & **0.7068** & **0.6866** & 0.2262 & 0.3815 \\ V15 & 3-Cycladal-2-one & \(-\)**0.6605** & \(-\)0.001 & \(-\)0.1487 & -0.0081 & 0.5058 & 0.4606 \\ V16 & 2-Acetyl-1-methylpyrrole & 0.0652 & **0.6320** & **0.6768** & 0.5811 & 0.1094 & 0.2566 \\ V17 & 3-Ethly-2-5-dimethylpyrazine & \(-\)0.1762 & **0.6566** & 0.4092 & **0.6729** & 0.4115 & 0.4399 \\ V18 & 2-Ethly-3-5-dimethylpyrazine & \(-\)0.1167 & **0.6941** & 0.4635 & **0.7085** & 0.3795 & 0.4271 \\ V19 & 2-5-Methylpyrazine & \(-\)0.1665 & **0.7169** & 0.4614 & **0.7351** & 0.4239 & 0.4626 \\ V20 & 2-Causical & 0.0527 & **0.7366** & **0.6933** & **0.6967** & 0.1917 & 0.3222 \\ V21 & 3-Ethly-2-hydroxy-2-cyclopentment-1 & \(-\)0.3873 & **0.6740** & 0.5526 & **0.6574** & 0.5963 & **0.6996** \\ V22 & Nomual & 0.0994 & 0.5327 & 0.3874 & 0.5662 & 0.1145 & 0.1230 \\ V23 & 3-Ethly-2-hydroxy-2-cyclopentment-1 & \(-\)0.3873 & **0.6740** & 0.5526 & **0.6574** & 0.5963 & **0.6996** \\ V22 & Nomual & 0.0994 & 0.5327 & 0.3874 & 0.5662 & 0.1145 & 0.1230 \\ V23 & 3-Ethly-2-Methyl-3-propylfuran & 0.251 & 0.4188 & **0.6402** & 0.4146 & 0.0515 & 0.2315 \\ V24 & 2-Methyl-6-7-dihydroxy-cyclopent(h)pyrazine & \(-\)0.1519 & **0.7498** & 0.5582 & **0.7790** & 0.4000 & 0.4689 \\ V26 & 1-Furfuryl pyrrole & \(-\)0.1563 & 0.5910 & 0.1064 & 0.5744 & 0.2252 & 0.1986 \\ V27 & Methyl salicylate & \(-\)0.2344 & 0.4278 & 0.1778 & 0.3649 & 0.4178 & 0.4739 \\ V28 & Nomual acid & \(-\)0.2095 & 0.7255 & 0.4007 & **0.6927** & 0.2501 & 0.3134 \\ V29 & 4-Ethly(quaicol & \(-\)0.1073 & **0.7424** & 0.4100 & **0.7242** & 0.2966 & 0.3288 \\ V30 & Durfuryl ether & 0.2240 & 0.5974 & 0.4923 & 0.5055 & \(-\)0.0282 & 0.0975 \\ V31 & 4-Virgulaicol & \(-\)**0.6003** & **0.6164** & 0.1443 & 0.5763 & 0.5454 & 0.4771 \\ V32 & Decanoic acid & \(-\)0.2637 & **0.7282** & 0.4161 & **0.7641** & 0.4482 & 0.4652 \\ V33 & 3-4-Dimethosbyrene & \(-\)0.5263 & 0.4180 & 0.2003 & 0.4760 & 0.5291 & 0.5141 \\ V34 & 2-4-D1-tert-butyl-phenol & 0.0732 & 0.5252 & 0.6752 & 0.5544 & 0.1575 & 0.2564 \\ V35 & Dodecanac acid & \(-\)0.5723 & 0.4563 & 0.4057 & 0.4021 & 0.5898 & **0.6323** \\ V36 & Tetadecanac acid & \(-\)0.3523 & \(-\)0.2690 & \(-\)0.2988 & \(-\)0.2671 & 0.1716 & 0.1626 \\ \hline \hline \end{tabular}  
* \({}^{1}\) Correlation coefficients (\(>\)0.60) are indicated in bold.  
\end{table}