## 3 Results and Discussion  
### Source Profile of Biomass Burning  
Table 2 and Figure 2 show the emission in chemical classes of PM\({}_{2.5}\) from burning of woods and agricultural byproducts. The burning materials appeared according to characteristics thereof; approximately 48%, 7% and 6% of chemical components that consist of PM\({}_{2.5}\) appeared as OC, ionic compounds and EC, respectively. Based on results of previously conducted studies, approximately 49% of chemical components except for OC, EC and ionic chemical components, are estimated to be comprised of heavy metals, tiny amount of moisture, H, N, S and O, etc. that consist of organic substances other than carbon components [7; 8; 9]. To estimate the contents of H, N, S and O except for carbon components, the ratios of OM/OC, based on molecular weight of 114 individual OC compounds which were analyzed in the present study, were calculated. From calculations of OM/OC, the WIOC appeared as 1.1 while the WSOC appeared as 1.5. Approximately 66% of chemical components consisting of PM\({}_{2.5}\) appeared as OC based organic matters from the application of the ratio of OM/OC to calculations of WIOC and WSOC, while the occupancy of components of OC, EC and ionic chemical components in PM\({}_{2.5}\) appeared as 79%. The correlation of the ratio of OM/OC with PM\({}_{2.5}\) was identified wherein the correlation coefficient more than 0.85 was found thereby the estimation of chemical components consisting of PM\({}_{2.5}\) through employing the ratio of OM/OC was identified reliable as shown in Figure 2. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline  & \multicolumn{6}{c}{**Forest Tree Types**} & \multicolumn{6}{c}{**Agricultural Crop Residues**} \\ \cline{2-10}
**Unit \(\mu\)g/m\({}^{3}\)** & **Pine** & **Ginkgo** & **Maple** & **Cherry** & **Stem** & **Rice** & **Soybean** & **Green** & **Red** \\  & **Needles** & **Stem** & **Leaves** & **Leaves** & **Teaves** & **Stem** & **Straw** & **Stem** & **Perilla** & **Pepper** \\ \hline PM\({}_{2.5}\) & 99,816 & 78,438 & 102,111 & 118,201 & 86,759 & 43,808 & 77,252 & 107,997 & 69,945 & 40,805 \\ OC & 53,514 & 28,566 & 53,794 & 60,307 & 49,993 & 14,457 & 41,548 & 55,554 & 27,886 & 11,602 \\ EC & 6496 & 8587 & 2673 & 2886 & 7446 & 2649 & 1392 & 5485 & 10,584 & 4719 \\ Ions & 4861 & 4219 & 5116 & 3369 & 7004 & 4890 & 2756 & 5527 & 9586 & 7029 \\ \hline
**Class-OC** & & & & & & & & & \\ WIOC & 19,785 & 2284 & 30,458 & 30,882 & 20,519 & 1678 & 9482 & 13,139 & 1764 & 725 \\ WSOC & 33,728 & 26,281 & 23,335 & 29,425 & 29,474 & 12,779 & 32,066 & 42,415 & 26,121 & 10,877 \\ \hline
**Class-WiOC** & & & & & & & & & \\ PAHs & 1179 & 653 & 134 & 172 & 191 & 201 & 170 & 183 & 426 & 105 \\ Alkanes & 291 & 102 & 969 & 1006 & 729 & 302 & 797 & 697 & 167 & 128 \\ \hline
**Class-WSOC** & & & & & & & & & \\ alkanoic acids & 6311 & 2750 & 7424 & 4848 & 3593 & 1252 & 6644 & 5986 & 1006 & 570 \\ benzene carboxylic & & 14 & 19 & 16 & 26 & 18 & 8 & 0 & 31 & 30 & 10 \\ acid & 352 & 124 & 80 & 137 & 94 & 62 & 196 & 230 & 32 & 19 \\ Amino acids & 32 & 10 & 28 & 37 & 8 & 11 & 81 & 67 & 11 & 11 \\ levoglucans & 1751 & 1950 & 1452 & 1783 & 2043 & 2274 & 1499 & 1656 & 1747 & 1308 \\ \hline
**Class-Ions** & & & & & & & & & \\
**Potassium** & 660 & 1326 & 2004 & 507 & 3298 & 1830 & 626 & 1382 & 4433 & 3424 \\
**Sulfrate** & 2040 & 1356 & 1436 & 1312 & 1488 & 1230 & 1152 & 1682 & 2996 & 1742 \\
**Nitrate** & 1680 & 964 & 957 & 1014 & 1138 & 960 & 701 & 1682 & 1797 & 931 \\
**Ammonium** & 480 & 573 & 718 & 537 & 1080 & 870 & 276 & 781 & 359 & 931 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Distribution of chemical abundances in fine particulate matter (PM\({}_{2.5}\)) mass. As a means to appraise the source of emission of PM\({}_{2.5}\), the ratio of OC/EC is used [34].