## 3 Results and Discussion
### Figures of Merit
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & & \multicolumn{3}{c}{**Clove\_1**} & \multicolumn{3}{c}{**Chilli\_1**} \\ \cline{3-8}
**Element** & **Added** & **Found** & \multirow{2}{*}{**RR\%**} & \multirow{2}{*}{**RSD\%**} & \multirow{2}{*}{**Found** **(mg kg\({}^{-1}\))**} & \multirow{2}{*}{**RR\%**} & \multirow{2}{*}{**RSD\%**} \\  & **(mg kg\({}^{-1}\))** & & & & & \\ \hline \multirow{4}{*}{Ag} & 0 & \textless{LOD} & - & - & \textless{LOD} & - & - \\  & 100 & 100.6 \(\pm\) 0.3 & 100.6 & 0.3 & \(104.8\pm 1.47\) & 104.8 & 1.4 \\  & 250 & 250.6 \(\pm\) 1.1 & 100.2 & 0.4 & \(249.5\pm 4.62\) & 99.8 & 1.9 \\  & 500 & 454.6 \(\pm\) 7.9 & 90.9 & 1.7 & \(490.2\pm 1.96\) & 98.0 & 0.4 \\ \hline \multirow{4}{*}{Al} & 0 & 312.2 \(\pm\) 3.4 & - & 1.1 & 166.6 \(\pm\) 2.4 & - & 1.4 \\  & 100 & 405.1 \(\pm\) 9.4 & 92.9 & 2.3 & \(258.9\pm 12.1\) & 92.3 & 4.7 \\  & 250 & 517.2 \(\pm\) 2.7 & 82.0 & 0.5 & \(448.5\pm 28.8\) & 112.8 & 6.5 \\  & 500 & 784.7 \(\pm\) 2.7 & 94.5 & 0.3 & \(665.1\pm 6.1\) & 99.7 & 0.9 \\ \hline \multirow{4}{*}{B} & 0 & 39.4 \(\pm\) 2.5 & - & 6.2 & \(11.0\pm 0.9\) & - & 8.2 \\  & 100 & 131.9 \(\pm\) 1.5 & 92.5 & 1.1 & \(114.7\pm 0.9\) & 103.7 & 0.8 \\  & 250 & 255.2 \(\pm\) 0.8 & 86.3 & 0.3 & \(232.7\pm 6.1\) & 88.7 & 2.6 \\  & 500 & 542.6 \(\pm\) 0.3 & 100.6 & 0.1 & \(515.0\pm 2.9\) & 100.8 & 0.6 \\ \hline \multirow{4}{*}{Ba} & 0 & 34.1 \(\pm\) 1.9 & - & 5.8 & 23.9 \(\pm\)1.3 & - & 5.4 \\  & 100 & 126.8 \(\pm\) 0.3 & 92.7 & 0.2 & 135.8 \(\pm\) 1.3 & 111.9 & 1.0 \\  & 250 & 255.1 \(\pm\) 3.9 & 88.4 & 1.5 & \(287.9\pm 25.7\) & 105.6 & 8.9 \\  & 500 & 515.9 \(\pm\) 2.0 & 96.4 & 0.4 & \(525.3\pm 0.7\) & 100.3 & 0.1 \\ \hline \multirow{4}{*}{Bi} & 0 & \textless{LOD} & - & - & \textless{LOD} & - & - \\  & 100 & 88.4 \(\pm\) 5.1 & 88.4 & 5.8 & \(104.5\pm 8.53\) & 104.5 & 8.2 \\  & 250 & 224.8 \(\pm\) 3.7 & 89.9 & 1.7 & \(233.0\pm 21.4\) & 93.2 & 9.2 \\  & 500 & 535.5 \(\pm\) 6.6 & 107.1 & 1.2 & \(533.5\pm 8.70\) & 106.7 & 1.6 \\ \hline \multirow{4}{*}{Ca} & 0 & \textless{LOD} & - & 0.9 & \(2449\pm 45.9\) & - & 1.9 \\  & 250 & 2498.3 \(\pm\) 74.9 & 101.3 & 3.0 & \(2710.5\pm 17.4\) & 104.6 & 0.6 \\  & 500 & 2784.0 \(\pm\) 12.5 & 107.8 & 0.5 & \(2930.5\pm 31.7\) & 96.3 & 1.1 \\ \hline \multirow{4}{*}{Cd} & 0 & \textless{LOD} & - & - & \textless{LOD} & - & - \\  & 100 & 98.7 \(\pm\) 0.5 & 98.7 & 0.5 & \(103.0\pm 0.7\) & 103.0 & 0.7 \\  & 250 & 250.7 \(\pm\) 1.6 & 100.3 & 0.6 & \(253.0\pm 22.3\) & 101.2 & 8.8 \\  & 500 & 491.5 \(\pm\) 0.6 & 98.3 & 0.1 & \(497.0\pm 2.0\) & 99.4 & 0.4 \\ \hline \multirow{4}{*}{Co} & 0 & \textless{LOD} & - & - & \textless{LOD} & - & - \\  & 100 & 106.8 \(\pm\) 0.7 & 106.8 & 0.7 & \(107.5\pm 0.3\) & 107.5 & 0.3 \\  & 250 & 263.7 \(\pm\) 4.2 & 105.5 & 1.6 & \(267.3\pm 11.6\) & 106.9 & 4.3 \\  & 500 & 515.8 \(\pm\) 1.7 & 103.2 & 0.3 & \(514.7\pm 0.3\) & 102.9 & 0.1 \\ \hline \multirow{4}{*}{Cr} & 0 & \textless{LOD} & - & - & \textless{LOD} & - & - \\  & 100 & 114.9 \(\pm\) 1.1 & 114.9 & 1.0 & \(117.5\pm 4.5\) & 117.5 & 3.8 \\  & 250 & 244.8 \(\pm\) 1.0 & 97.9 & 0.4 & \(273.4\pm 7.9\) & 109.4 & 2.9 \\  & 500 & 555.7 \(\pm\) 10.0 & 111.1 & 1.8 & \(537.4\pm 11.5\) & 107.5 & 2.1 \\ \hline \multirow{4}{*}{Cu} & 0 & 1.30 \(\pm\)0.01 & - & 0.8 & \(4.71\pm 0.21\) & - & 4.3 \\  & 100 & 92.3 \(\pm\) 0.8 & 91.0 & 0.9 & \(97.5\pm 3.1\) & 92.8 & 3.1 \\  & 250 & 236.1 \(\pm\) 0.4 & 93.9 & 0.2 & \(235.4\pm 15.8\) & 92.3 & 6.7 \\  & 500 & 528.1 \(\pm\) 8.7 & 105.4 & 1.7 & \(520.0\pm 9.4\) & 103.1 & 1.8 \\ \hline \multirow{4}{*}{Fe}  
As it can be observed, the RR% values for each metal ranged between 82.0% and 117.5%. Thus, the proposed method exhibits sufficient trueness. The RSD values for the repeated measurements ranged between 0.1% and 9.5%, indicating that the proposed method exhibits good precision.