## 3 Results
Twenty nine collective microbial volatile organic compounds were extracted from the headspace of _Stachybortys chartarum_, as shown in Figure 5: benzyl alcohol, cyclopropane, nonanal, hexanoic acid, benzene, 1,3-pentanediol, acetic acid, nonanol, ethanol, decanal, benzothiazole, nonanoic acid, 1-undecanol, tetradecane, diphenyl ether, oxirane, cyclotetradecane, 2,5-cyclohexadiene-1,4-dione, 1-pentadecene, cyclododecane, benzoic acid, n-nonlycyclohexane, 1-heptadecene, methyl pentadecyl ether, n-butyl laurate, octadecane, cyclohexadecane, hexadecanoic acid, and octadecanoic acid. The compounds found in the headspace of Corn Meal agar alone were \begin{table}
\begin{tabular}{|l|r|r|} \hline
**Compound** & **Peak Area** & **Retention Time** \\ \hline Arsenous acid & 0.43 & 6.37 \\ \hline
1-methoxycyclohexane & 0.23 & 7.74 \\ \hline Furan & 0.16 & 10.48 \\ \hline
1-hexanol & 0.39 & 11.21 \\ \hline Nonanal & 0.24 & 12.56 \\ \hline Hexanoic acid & 5.33 & 12.91 \\ \hline Benzene & 1.08 & 13.61 \\ \hline Naphthalene & 0.12 & 13.92 \\ \hline
1-undecanol & 0.15 & 16.55 \\ \hline Oxirane & 1.21 & 17.13 \\ \hline Cyclododecane & 0.61 & 17.85 \\ \hline Dodecanoic acid & 0.22 & 18.88 \\ \hline Phenol & 0.22 & 19.04 \\ \hline Butyl caprate & 0.22 & 19.21 \\ \hline
1-docosene & 0.15 & 19.28 \\ \hline Cyclotetradecane & 0.13 & 20.25 \\ \hline Heptadecane & 0.13 & 20.50 \\ \hline Tetradecanoic acid & 0.38 & 21.14 \\ \hline Z,E-2-methyl-3,13-octadecan-1-ol & 0.10 & 21.27 \\ \hline n-butyl laurate & 0.48 & 21.43 \\ \hline
1-heptadecanol & 0.13 & 22.42 \\ \hline n-butyl myristate & 0.41 & 23.45 \\ \hline
1,4,7,10,13,16,19-heptaoxa-2- & 0.10 & 23.82 \\ cyclohexenciosanone & & \\ \hline Hexadecanoic acid & 0.34 & 25.30 \\ \hline \end{tabular}
\end{table} 
Table 2: Compounds detected in headspace of _Penicillium chrysogenum_ on PDA, 18 hour exposure, CW/DVB (StableFlex), with peak areas and retention times of each compound. Figure 4: Chromatogram of _Penicillium chrysogenum_, CW/DVB, 18 hour exposure. The time study experiments analyzing the headspace of _Stachybotrys chartarum_ was run for three consecutive weeks. Twenty-seven known compounds were identified from the headspace of _Stachybotrys chartarum_ samples using CW/DVB SPME fibers and an exposure time of 18 hours. The field test data show that the canines successfully alert to the _in vitro_ toxic mold samples, with a slightly lower accuracy than previous tests have shown canines alerting to the mold-inoculated pieces of drywall that were used for their training. From the canine field tests, nine of the twelve positive controls grown in the laboratory were alerted to by the four new canines tested. Canine # 1 alerted to 66.6% of the positive controls, missing one. Canine # 2 alerted to 100% of the positive controls. Canine # 3 alerted to 33.3% of the positive controls, missing two. Canine # 4 alerted to 100 % of the positive controls. Tables 5 and 6 show accuracy statistics in terms of each positive control and each canine tested. **Table 5**. Results from canine field tests on May 5, 2005 in terms of _in vitro_ toxic mold sample positive controls. Numbers in the Alert and No Alert columns denote which canine elicited the respective response to each mold inoculated drywall training aid positive control.