## 3 Results and Discussion
### Analysis of Elemental Compositions in Urban PMs and Incineration Asl
**} \\ \multicolumn{2}{c}{**Uncertainty**} & \multicolumn{2}{c}{**Values (mg/kg)**} & \multicolumn{2}{c}{**Uncertainty**} & \multicolumn{2}{c}{**(KRISS/NIST)**} & \multicolumn{2}{c}{**Uncertainty**} & \multicolumn{2}{c}{**(KRISS/NIST)**} \\  & \multicolumn{2}{c}{**(mg/kg, \(k=2\))**} & & \multicolumn{2}{c}{**(mg/kg, \(k=2\))**} & & \multicolumn{2}{c}{**(mg/kg, \(k=2\))**} & \\ \hline Ag & 6.94 \(\pm\) 0.50 & 6.0 \(\pm\) 0.3 & 1.60 & 1.27 \(\pm\) 0.18 & \(-\)82\% & 20.3 \(\pm\) 1.5 & 192\% \\ \multicolumn{2}{c}{* Al} & 33,528 \(\pm\) 4024 & 34,300 \(\pm\) 1300 & -0.28 & 49.359 \(\pm\) 3847 & 47\% & 10,6021 \(\pm\) 7457 & 216\% \\ \multicolumn{2}{c}{* Al} & 1249 \(\pm\) 8.8 & 115.5 \(\pm\) 3.9 & 0.98 & 3.47 \(\pm\) 2.5 & \(-\)72\% & 19.4 \(\pm\) 1.4 & \(-\)84\% \\ \multicolumn{2}{c}{Au} & 0.028 \(\pm\) 0.006 & N/A & - & 0.279 \(\pm\) 0.115 & 904\% & 4.08 \(\pm\) 0.32 & 14563\% \\ \multicolumn{2}{c}{* Ba} & 680 \(\pm\) 57 & N/A & - & 1361 \(\pm\) 102 & 100\% & 1917 \(\pm\) 233 & 182\% \\ \multicolumn{2}{c}{Br} & 520 \(\pm\) 37 & 502 \(\pm\) 10 & 0.47 & 578.4 \(\pm\) 4.1 & \(-\)89\% & 21.7 \(\pm\) 0.18 & \(-\)100\% \\ \multicolumn{2}{c}{Ca} & 56,422 \(\pm\) 4074 & 58,400 \(\pm\) 1900 & -0.44 & 42,076 \(\pm\) 3186 & \(-\)25\% & 48,097 \(\pm\) 3929 & \(-\)15\% \\ \multicolumn{2}{c}{* Cd} & 76.3 \(\pm\) 5.5 & 73.7 \(\pm\) 2.3 & 0.44 & 5.45 \(\pm\) 1.50 & \(-\)93\% & 7.22 \(\pm\) 0.82 & \(-\)91\% \\ \multicolumn{2}{c}{Ce} & 50.8 \(\pm\) 3.8 & 54.6 \(\pm\) 2.2 & \(-\)0.88 & 69.1 \(\pm\) 5.8 & 36\% & 99.1 \(\pm\) 7.4 & 95\% \\ \multicolumn{2}{c}{* Cl} & 4729 \(\pm\) 334 & 4543 \(\pm\) 47 & 0.55 & 12,642 \(\pm\) 930 & 167\% & LOD \(=\) 112 & - \\ \multicolumn{2}{c}{Co} & 17.3 \(\pm\) 1.3 & 17.93 \(\pm\) 0.68 & \(-\)0.42 & 19.1 \(\pm\) 1.4 & 10\% & 16.8 \(\pm\) 1.2 & \(-\)3\% \\ \multicolumn{2}{c}{Cr} & 397 \(\pm\) 2.9 & 402 \(\pm\) 13 & \(-\)0.16 & 219 \(\pm\) 18 & \(-\)45\% & 238 \(\pm\) 17 & \(-\)40\% \\ \multicolumn{2}{c}{Cs} & 3.38 \(\pm\) 0.24 & 3.4 \(\pm\) 0.2 & \(-\)0.06 & 4.67 \(\pm\) 0.33 & 38\% & 5.30 \(\pm\) 0.38 & 57\% \\ \multicolumn{2}{c}{* Cu} & 682 \(\pm\) 90 & 610 \(\pm\) 70 & 0.63 & 854 \(\pm\) 100 & 25\% & 2054 \(\pm\) 252 & 201\% \\ \multicolumn{2}{c}{* DY} & 3.37 \(\pm\) 0.30 & N/A & - & 3.40 \(\pm\) 0.42 & 0.9\% & 3.95 \(\pm\) 0.48 & 17\% \\ \multicolumn{2}{c}{Eu} & 1.52 \(\pm\) 0.11 & N/A & - & 1.15 \(\pm\) 0.09 & \(-\)24\% & 1.32 \(\pm\) 0.11 & \(-\)13\% \\ \multicolumn{2}{c}{Fe} & 38,162 \(\pm\) 2767 & 39,200 \(\pm\) 1200 & -0.30 & 39,139 \(\pm\) 2997 & 2.6\% & 39,446 \(\pm\) 2838 & 3.4\% \\ \multicolumn{2}{c}{* Ga} & 17.5 \(\pm\) 1.3 & N/A & - & 100 \(\pm\) 18.1 & - & 24.6 \(\pm\) 2.5 & 41\% \\ \multicolumn{2}{c}{Hf} & 4.15 \(\pm\) 0.30 & 5.2 & - & 7.40 \(\pm\) 0.53 & 78\% & 4.74 \(\pm\) 0.35 & 14\% \\ \multicolumn{2}{c}{Hg} & 1.49 \(\pm\) 0.14 & 1.323 \(\pm\) 0.054 & 1.07 & 0.447 \(\pm\) 0.074 & \(-\)70\% & LOD \(=\) 0.5 & - \\ \multicolumn{2}{c}{* I} & 20.5 \(\pm\) 3.5 & N/A & - & 27.2 \(\pm\) 5.2 & 33\% & LOD \(=\) 18 & - \\ \multicolumn{2}{c}{* In} & 0.986 \(\pm\) 0.077 & N/A & - & 1.08 \(\pm\) 0.08 & 10\% & 0.547 \(\pm\) 0.091 & \(-\)45\% \\ \multicolumn{2}{c}{K} & 9986 \(\pm\) 763 & 10,560 \(\pm\) 490 & -0.63 & 16,739 \(\pm\) 146 & 68\% & 29630 \(\pm\) 2470 &