## 3 Results
### Temporal Effect on Volatile Organic Compounds in Cat Feces
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Compounds**} & **Retention** & **Oder Description** & **Description by** & **\% Match** & **Frees *** & **Frees *** & **Slate Frees * & \multirow{2}{*}{**Slate Frees * Long**} & \multirow{2}{*}{**Ion (\% Relative**)**} \\  & **Time** & **Fullished Work** & **Panelist** & **Library** & **CAS *** & **Equilibrium** & **Long** & **Ion (\% Relative**)** \\  & **(in)** & & & & & **MS Detector Response, Peak Area Count (PACs), and & & & \\ \hline Benzenethanol & 21.24 & & & & 91 & 60-12-8 & 38490 & & 91(100), 9250, 122(25), \\ Benzenet permeable acid, & & & & 93 & 103-25-3 & 210,723 & & & 104(100), 9164(30), \\ methyl sor & & & & 93 & 103-25-3 & 210,723 & & & 105(30) \\ Phenol & 22.10 & phenol* & & & 96 & 108-95-2 & 10,114/684 & 2,023,698 & 315,771 & 94(100), 6645, 6725, \\
2-Dodecanone & 22.5 & & & 85 & 6175-8-1 & 77,879 & & & 80(100), 920, 17(15), \\ Benzenetpropensity acid, & & & & 85 & 2021-28-5 & 148,940 & & & 104(100), 914(125), 105(30), \\ ethyl ester & & & & & 85 & 2021-28-5 & 148,940 & & 107(100), 128(20), 720(20), \\ p-Cresol & 23.30 & Smoke*, medicine & Medicinal & 93 & 106-44-5 & 39,957,137 & 3,947,249 & 1,376,506 & 107(1000), 128(200), 722(20), \\ Phenol, 4-ethyl- & 24.80 & Most* & Foul, unpleasant & 94 & 123-07-9 & 1,021,035 & 103,774 & 107(1000), 128(30), \\ Buylated hydroxyglucose & 25.10 & - & & 96 & 128-37-0 & 182,612 & 52,706 & 26(2010), 2202, 57(515), \\ Indide & 28.38 & Burnt* & Medicinal, unpleasant & 96 & 120-72-9 & 69,332,928 & 195,879 & 810,599 & 117(1000), 904(89), 809(39), \\ Dieethyl Pathulate & 29.08 & - & & 94 & 84-66-2 & 81,563 & & 450(20) \\ Indide, 3-methyl- & 29.2 & Focal* & Ultrason, animal & 71 & 83-34-1 & 78,663 & & 140(1000), 134(50), \\ \hline \hline \end{tabular}
* Fifty min exposure to: SPME at 37 °C,
* 15 min equilibrium and 50 min exposure to SPME at 37 °C,
* 24 h equilibrium and 50 min exposure to SPME at 37 °C,
* 24 h equilibrium and 50 min exposure to SPME at 37 °C;
* order verified with
* Fluorescent [15] and
* Good Semi Company [14].
* Below 60% library math considered as semi-conformative.  
\end{table} 
Table 3: _Cott._The fresh feces on 50 min exposure to SPME fiber caused several ketones, aldehydes, esters, acids, and phenols to accumulate in the SPME fiber. Among these identified chemicals, most of the high-molecular-weight compounds have \"smoke\", \"medicinal\", \"animal\", and \"foul\" smells, whereas the low-molecular-weight chemicals had more \"chemical\", \"sweet\", \"fruity\", and \"grassy\" or \"earthy\" smells. From this, it is more obvious that the high-molecular-weight phenolic and N-aromatic heterocyclic compounds are the contributors to the overall smell of the fresh feces. The compounds with high molar masses that appeared after a retention time of 20 min or higher had intense malodors. It is interesting to mention that, for stale feces, a short equilibration time of 10 min resulted in missing many low-molecular-weight compounds, and several high-molecular-weight compounds had high PAC-like p-cresol, phenol, and guaiacol compared to long equilibration times of 24 h. In stale feces, the primary contributors such as 3-methyl indole were missing, and phenolics had lower PAC (4-ethyl phenol, p-cresol, and phenol) than phenolics in fresh feces headspaces. The odor intensity of the many chemicals, including phenolic compounds, were similar in the stale cat feces, as revealed by the GC-MS-olfactometer. The aromagrams of feces samples show that the presence of odorants even in the below-the-detection-limit concentration for GC-MS can cause a considerable odor impact (the green line in Figures 3 and 4) problem. The aromagram also revealed that compounds not in the GC-MS data can still contribute to the overall odor, thus triggering the human nose to react to the odorants.