## 5 Comparison of Emission Results Found in the Literature  
Due to the wide selection of analytical methods available for identification and/or determination of VOCs in wood and WBP, results are often reported in different units [70; 74; 134; 135], as relative proportions [61; 63; 136; 137], or simply identified without quantification [68; 76; 97; 98]. Moreover, different testing conditions are commonly used. As a result, comparing VOC emission data is challenging, unless they share the same analytical method and somewhat similar testing conditions. A more detailed compilation of VOCs found in different wood types and WBPs--including key information such as the analytical method employed for identification or determination, test conditions, VOC class, and results--is available in the Excel file provided as Supporting Information, which includes more than 2100 entries. A summarized version of this information, which compares the emissions of volatile compounds (e.g., terpenes, carbonyl, and other compounds) from different wood types and WBP based on the analysis method and experimental conditions, is presented in Tables 9, 10 and S1. \begin{table}
\begin{tabular}{l l l l l l l l l} \hline \hline
**Wood** & **Conditions** & **Compounds** & **Value** & **Compounds** & **Value** & **Unit** & **Method** & **References** \\ \hline
**Douglas Fir** & & & a-Primee & 11 & Limnene & 9 & & & \\  & Conditioned (23 \({}^{\circ}\)C,495 RH) & & j-Primee & 1 & Bronel & 4 & & & \\  & 4 days of sampling period & \({}^{\circ}\)3-Camera & 2 & P-Cymene & 4 & & & \\  & & \({}^{\circ}\)-Primee/\({}^{\circ}\)33-Carene & 8 & Bronel & 4 & & & ASTM D \\  & & & \({}^{\circ}\)-Primee/Limnene & 38 & P-Cymene & 8 & & 5116-940 [138] \\ \hline
**Fir** & & & a-Primee & \(115\pm 1\) & Cypne & \(6.16\pm 0.05\) & & \\  & & & b-Primee & \(20.99\pm 0.09\) & Bronel & \(3.44\pm 0.08\) & & \\  & Untreated & & Limnene & \(6.2\pm 0.1\) & Frenchl & \(2.4\pm 0.2\) & & \\  & Age of wood: 1 year & & Camphene & \(12.3\pm 0.3\) & Thymot & \(4.3\pm 0.1\) & & \\  & & a-Prallandrene & \(1.65\pm 0.04\) & Myrtral & \(6.1\pm 0.2\) & & \\  & & Vetbreno & \(7.6\pm 0.1\) & & & & \\ \cline{2-7}  & & \({}^{\circ}\)-Primee & \(0.175\pm 0.003\) & Cypne & \(0.0252\pm 0.0009\) & & \\  & & \({}^{\circ}\)-Primee & \(0.067\pm 0.001\) & Bronel & \(0.0163\pm 0.0022\) & & Hexane & \\ Solid Wood & Heat treatment (20 \({}^{\circ}\)C) & & Limnene & \(0.0413\pm 0.0004\) & Frenchl & \(0.0077\pm 0.0001\) & \({}^{\circ}\)mg-kg-1 & \({}^{\circ}\)extinction and & \\  & Age of wood: 1 year & & Camphene & \(0.009\pm 0.002\) & Thymot & \(0.040\pm 0.002\) & & CC-MS \\ \cline{2-7}  & & \({}^{\circ}\)-Prallandrene & \(0.169\pm 0.003\) & Myrtral & \(0.0459\pm 0.0009\) & & \\  & & Vetbreno & \(0.455\pm 0.009\) & & & & \\ \cline{2-7}  & Untreated & \({}^{\circ}\)-Primee & \(4.33\pm 0.03\) & Vetbreno & \(0.80\pm 0.02\) & & \\ Age of wood: 146 years & & J-Primee & \(0.192\pm 0.003\) & Thymot & \(0.52\pm 0.01\) & & \\ \cline{2-7}  & Limnene & \(1.0672\pm 0.013\) & Myrtral & \(1.2875\pm 0.004\) & & \\ \cline{2-7}  & & & \(0.387\pm 0.004\) & & & & \\ \cline{2-7}  & Host treatment (20 \({}^{\circ}\)C) & & Limnene & \(0.337\pm 0.006\) & Bronel & \(0.6303\pm 0.006\) & \\ \cline{2-7}  & & & & & & \\ \cline{2-7}  & & & & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 9. Summary of methods and measured values for terpenes found in wood and WBP.