## 3 Results and Discussion
### Method Validations  
#### 3.3.1 LOD, LOQ, and Linearity of the Calibration Curve  
The LODs were 3 \(\mu\)g kg\({}^{-1}\) and LOQs were 10 \(\mu\)g kg\({}^{-1}\) for each pesticide. Linearity refers to the ability of an experimental method to obtain a linear measurement value for the amount or concentration of an analyte in a sample within a certain range. The results of the GC-MS/MS (Tables 3 and S3) and LC-MS/MS (Tables 4 and S4) analyses of the soil samples were evaluated by calculating correlation coefficients, y-intercepts, and bracket calibration curves of matrix-matched standard solutions. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Pesticides**} & \multirow{2}{*}{**RT (min)**} & \multirow{2}{*}{**Ionization**} & \multicolumn{3}{c}{**Precursor \textgreater{} Product Ion (CE, eV)**} \\ \cline{3-6}  & & & & **Quantifier Ion** & **Qualifier Ion** \\ \hline Carbendazim & 4.484 & M + H\({}^{+}\) & 192.1 \(>\) 160.1 & \(-\)18 & 192.1 \(>\) 132 & \(-\)29 \\ Carboturan & 5.519 & M + H\({}^{+}\) & 222 \(>\) 123.05 & \(-\)12 & 222 \(>\) 165.2 & \(-\)22 \\ Carboxin & 5.723 & M + H\({}^{+}\) & 236 \(>\) 143.05 & \(-\)14 & 236 \(>\) 87.15 & \(-\)24 \\ Carfentrazone-ethyl & 8.661 & M + H\({}^{+}\) & 411.9 \(>\) 346.05 & \(-\)23 & 411.9 \(>\) 366.1 & \(-\)18 \\ Carpropamide & 8.907 & M + H\({}^{+}\) & 334 \(>\) 138.95 & \(-\)21 & 334 \(>\) 103.1 & \(-\)42 \\ Chlor pyrifos & 11.021 & M + H\({}^{+}\) & 349.9 \(>\) 198.05 & \(-\)20 & 349.9 \(>\) 97 & \(-\)33 \\ Chlorosulfuron & 5.563 & M + H\({}^{+}\) & 357.9 \(>\) 141.2 & \(-\)17 & 357.9 \(>\) 167.2 & \(-\)18 \\ Chromatenzo & 7.974 & M + H\({}^{+}\) & 395.2 \(>\) 175.15 & \(-\)18 & 395.2 \(>\) 147.1 & \(-\)44 \\ Clethodium & 10.174 & M + H\({}^{+}\) & 359.9 \(>\) 163.9 & \(-\)21 & 359.9 \(>\) 77.1 & \(-\)55 \\ Clofentezine & 9.297 & M + H\({}^{+}\) & 302.8 \(>\) 138.1 & \(-\)15 & 302.8 \(>\) 102.05 & \(-\)36 \\ Clomazone & 6.884 & M + H\({}^{+}\) & 240.1 \(>\) 125.15 & \(-\)21 & 240.1 \(>\) 99.1 & \(-\)44 \\ Clothianidin & 4.535 & M + H\({}^{+}\) & 250 \(>\) 169.1 & \(-\)13 & 250 \(>\) 132.1 & \(-\)16 \\ Cyazofamid & 8.076 & M + H\({}^{+}\) & 324.9 \(>\) 108.2 & \(-\)15 & 324.9 \(>\) 261.3 & \(-\)11 \\ Cyclosulfamuron & 7.780 & M + H\({}^{+}\) & 422 \(>\) 261.15 & \(-\)17 & 422 \(>\) 218.15 & \(-\)27 \\ Cyflufenamid & 9.213 & M + H\({}^{+}\) & 413.1 \(>\) 202.8 & \(-\)38 & 412.9 \(>\) 240.9 & \(-\)24 \\ Cyhalofop-butyl & 9.940 & M + H\({}^{+}\) & 375.0 \(>\) 256.0 & \(-\)13 & 375.0 \(>\) 120.1 & \(-\)25 \\ Cymoxanil & 4.801 & M + H\({}^{+}\) & 198.9 \(>\) 128.2 & \(-\)10 & 198.9 \(>\) 111.1 & \(-\)17 \\ Cyproconazole(I) & 7.539 & M + H\({}^{+}\) & 292.1 \(>\) 70.2 & \(-\)18 & 292.1 \(>\) 125.15 & \(-\)30 \\ Cyproconazole(II) & 7.832 & M + H\({}^{+}\) & 292.1 \(>\) 70.2 & \(-\)18 & 292.1 \(>\) 125.15 & \(-\)30 \\ Daimuron & 7.559 & M + H\({}^{+}\) & 269.2 \(>\) 151.2 & \(-\)12 & 269.2 \(>\) 119.2 & \(-\)21 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: _Cont._ \begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Pesticides**} & \multicolumn{2}{c}{**Limit of Detection**} & \multicolumn{2}{c}{**Limit of Quantification**} & \multirow{2}{*}{**Linearity (\(r^{2}\))**} \\ \cline{3-4}  & & **(\(\mu\)g kg\({}^{-1}\))** & **(\(\mu\)g kg\({}^{-1}\))** & **(\(\mu\)g kg\({}^{-1}\))** & **Linearity (\(r^{2}\))** \\ \hline
1 & Acrinathrin & 3 & 10 & 0.9998 \\
2 & Alachlor & 3 & 10 & 0.9999 \\
3 & Aldrin & 3 & 10 & 0.9995 \\
4 & Ametocradin & 3 & 10 & 0.9974 \\
5 & Anilofos & 3 & 10 & 0.9999 \\
6 & Azaconazole & 3 & 10 & 0.9999 \\
7 & Benfuresate & 3 & 10 & 0.9985 \\
8 & BHC(Lindane)-gamma & 3 & 10 & 0.9984 \\
9 & BHC-alpha & 3 & 10 & 0.9993 \\
10 & BHC-beta & 3 & 10 & 0.9994 \\
11 & BHC-delta & 3 & 10 & 0.9978 \\
12 & Bifenox & 3 & 10 & 0.9986 \\
13 & Bifenthrin & 3 & 10 & 0.9993 \\
14 & Bromobutide & 3 & 10 & 0.9973 \\
15 & Bromopropylate & 3 & 10 & 0.9999 \\
16 & Butachlor & 3 & 10 & 0.9999 \\
17 & Butafenacil & 3 & 10 & 0.9996 \\ \hline \hline \end{tabular}
\end{table}