## 3 Results  
From the chromatographic data obtained, the results indicate that the odor signatures for _Aspergillus versicolor_, _Penicillium chrysogenum_, and _Stachybotrys chartarum_ are very different. The CW/DVB fiber successfully extracted 22 known compounds that matched the NIST 98 library from the headspace of _Aspergillus versicolor_, 19 known compounds from the headspace of _Penicillium chrysogenum_, and 29 known compounds from the headspace of _Stachybotrys chartarum_. Twenty two collective microbial volatile organic compounds were extracted from the headspace of _Aspergillus versicolor_ and detected by SPME-GC/MS analysis: arsenous acid, 1-octen-3-ol, 3-octanone, 3-octanol, 1-hexanol, hexanoic acid, pentanedinitrile, benzene, 2,3-dimethoxyytoluene, 2-undecanone, benzamide, 1-butanol, 2-propenoic acid, 1,4,7,10,13,16,19-heptaoxa-2-cycloheneicosanone, 1-tridecanol, 2-tridecanone, dodecanoic acid, 2,6-bis(1,1-dimethylethyl)-4-(1-oxypropyl)phenol, 9H-fluoren-3-ol, tetradecanoic acid, n-butyl laurate, and n-hexadecanoic acid. Compounds detected in the headspace of PDA were subtracted from the list of compounds detected in the headspace of _Aspergillus versicolor_, as they cannot be proven to be microbial volatile organic compounds at this time. Table 1 below list the compounds detected, as well as their retention times and % peak areas. Figure 3: Chromatogram of _Aspergillus versicolor_ headspace, CW/DVB, 18 hr exposure. Similarly, a variety of compounds were observed from the headspace of the _Penicillin chrysogenum,_ as shown in Figure 4. Nineteen collective microbial volatile organic compounds were extracted from the headspace of _Penicillin chrysogenum_ and detected by SPME-GC/MS analysis: arsenous acid, 1-methoxycyclohexane, furan, 1-hexanol, nonanal, hexanoic acid, benzene, naphthalene, 1-undecanol, oxirane, cyclododecane, dodecanoic acid, butyl caprate, 1-docosene, tetradecanoic acid, Z,E-2-methyl-3,13-octadecadien-1-ol, n-butyl laurate, 1-heptadecanol, and 1,4,7,10,13,16,19-heptaoxa-2-cycloheneicosanone. Compounds detected in the headspace of PDA were subtracted from the list of compounds detected in the headspace of _Penicillin chrysogenum_, as they cannot be proven to be microbial volatile organic compounds. Table 2 below list the compounds detected, as well as their retention times and % peak areas. \begin{table}
\begin{tabular}{|l|r|r|} \hline
**Compound** & **Peak Area** & **Retention Time** \\ \hline Arsenous acid & 0.65 & 6.35 \\
1-octen-3-ol & 1.73 & 10.24 \\ \hline
3-octanone & 0.72 & 10.38 \\ \hline
3-octanol & 0.14 & 10.57 \\ Ethanol & 2.14 & 10.84 \\
1-hexanol & 0.14 & 10.57 \\ Hexanoic acid & 0.52 & 11.49 \\ Pentanedintrile & 0.15 & 11.98 \\ Benzene & 1.93 & 13.62 \\ Phenol & 0.14 & 14.20 \\
2,3-dimethyloctuene & 0.12 & 14.70 \\
2-undecanone & 0.36 & 15.48 \\ Benzamide & 0.26 & 16.11 \\
1-butanol & 0.58 & 16.97 \\
2-propenoic acid & 0.24 & 17.10 \\
1,4,7,10,13,16,19-heptaoxa-2- & 0.62 & 17.80 \\ cyclohexicosanone & & \\
1-tindecanol & 0.26 & 17.85 \\
2-tridecanone & 0.09 & 18.15 \\ Cyclododecane & 0.13 & 18.57 \\ Dodecanoic acid & 0.98 & 18.90 \\
2,6-bis(1,1-dimethylethyl)-4-(1- & 0.07 & 19.88 \\ oxypropyl)phenol & & \\ Cyclotetadecane & 0.26 & 20.25 \\
9H-fluoren-3-ol & 0.16 & 20.60 \\ Tetradecanoic acid & 0.58 & 21.14 \\ n-butyl laurate & 0.53 & 21.44 \\ n-hexadecanoic acid & 0.73 & 23.19 \\ n-butyl myristate & 0.61 & 23.46 \\ Hexadecanoic acid & 0.40 & 25.31 \\ \hline \end{tabular}
\end{table} 
Table 1: Compounds detected in headspace of _Aspergillus versicolor_ on PDA, 18 hour exposure, CW/DVB (StableFlex), with peak areas and retention times of each compound.