## 3 Results and Discussion
### Analytical Performance
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Analytes**} & \multirow{2}{*}{**Spiked**} & \multicolumn{3}{c}{**Tomato**} & \multicolumn{3}{c}{**Cucumber**} & \multicolumn{3}{c}{**Pakchoi**} \\ \cline{3-10}  & & **Found (ng g\({}^{-1}\))** & **Recovery** & **RSD** & **Found (ng g\({}^{-1}\))** & **Recovery** & **RSD** & **Found (ng g\({}^{-1}\))** & **Recovery** & **RSD** \\  & & & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **Found (ng g\({}^{-1}\))** & **(\%)** & **Found (ng g\({}^{-1}\))** & **(\%)** & **(\%)** \\ \hline  & 0 & ND & ND & ND & & ND & ND & & ND \\ Isocarbophos & 5 & \(5.3\pm 0.3\) & 105.3 & 6.5 & \(4.8\pm 0.2\) & 96.4 & 5.0 & \(5.2\pm 0.3\) & 104.3 & 5.8 \\  & 25 & \(24.6\pm 0.9\) & 98.5 & 3.8 & \(23.7\pm 1.1\) & 94.6 & 4.5 & \(26.5\pm 1.0\) & 106.1 & 3.7 \\  & 50 & \(50.8\pm 2.6\) & 101.6 & 5.1 & \(51.7\pm 1.9\) & 103.4 & 3.9 & \(46.7\pm 2.8\) & 93.3 & 5.9 \\  & 0 & ND & & ND & & ND & & ND & & \\ Quinalphos & 5 & \(4.4\pm 0.2\) & 87.7 & 3.6 & \(4.8\pm 0.3\) & 95.7 & 5.6 & \(5.2\pm 0.2\) & 104.2 & 4.5 \\  & 25 & \(23.7\pm 1.1\) & 94.6 & 4.8 & \(22.6\pm 1.4\) & 90.2 & 6.3 & \(25.7\pm 1.0\) & 103.0 & 3.7 \\  & 50 & \(49.2\pm 2.3\) & 98.3 & 4.7 & \(48.3\pm 2.3\) & 96.5 & 4.7 & \(46.3\pm 3.1\) & 92.6 & 6.7 \\  & 0 & ND & & ND & & ND & & ND & & \\ Phorate & 5 & \(4.9\pm 0.6\) & 97.1 & 11.2 & \(4.0\pm 0.4\) & 79.2 & 9.8 & \(4.9\pm 0.4\) & 82.3 & 8.0 \\  & 25 & \(24.4\pm 1.8\) & 97.7 & 7.2 & \(24.6\pm 1.6\) & 98.3 & 6.4 & \(26.8\pm 1.6\) & 107.0 & 5.8 \\  & 50 & \(50.7\pm 2.0\) & 101.4 & 4.0 & \(47.3\pm 1.6\) & 94.5 & 3.4 & \(46.2\pm 1.5\) & 92.4 & 3.2 \\  & 0 & ND & & ND & & ND & & ND & & \\ Chlorpyrifos & 5 & \(5.1\pm 0.2\) & 101.9 & 4.2 & \(5.3\pm 0.4\) & 105.6 & 6.8 & \(5.2\pm 0.2\) & 104.3 & 4.5 \\  & 25 & \(24.1\pm 0.9\) & 96.4 & 3.8 & \(25.6\pm 1.7\) & 102.5 & 6.7 & \(24.1\pm 0.9\) & 96.5 & 3.7 \\  & 50 & \(48.3\pm 1.3\) & 96.5 & 2.7 & \(46.8\pm 2.6\) & 93.6 & 5.5 & \(47.9\pm 1.9\) & 95.8 & 3.9 \\  & 0 & ND & & ND & & ND & & ND & & \\ Phosalone & 5 & \(4.9\pm 0.4\) & 97.2 & 8.5 & \(5.1\pm 0.2\) & 102.8 & 3.6 & \(4.8\pm 0.2\) & 96.7 & 4.1 \\  & 25 & \(23.8\pm 0.9\) & 95.1 & 3.6 & \(23.6\pm 0.6\) & 94.6 & 2.5 & \(22.6\pm 0.9\) & 90.3 & 3.8 \\  & 50 & \(47.3\pm 2.5\) & 94.6 & 5.4 & \(48.3\pm 1.2\) & 96.6 & 2.4 & \(46.4\pm 1.3\) & 92.9 & 2.7 \\  & 0 & ND & & ND & & ND & & ND & & \\ Pirimor & 5 & \(5.5\pm 0.3\) & 109.4 & 4.8 & \(5.0\pm 0.3\) & 100.5 & 6.2 & \(5.2\pm 0.1\) & 104.5 & 2.8 \\  & 25 & \(25.3\pm 1.4\) & 101.3 & 5.6 & \(24.6\pm 1.0\) & 98.4 & 4.1 & \(24.7\pm 0.9\) & 98.6 & 3.7 \\  & 50 & \(47.6\pm 1.6\) & 95.2 & 3.3 & \(52.4\pm 1.6\) & 104.7 & 3.0 & \(50.1\pm 2.6\) & 100.2 & 5.1 \\  & 0 & ND & & ND & & & ND & & & \\ Carbaryl & 5 & \(5.4\pm 0.5\) & 100.7 & 9.8 & \(5.4\pm 0.2\) & 108.7 & 4.2 & \(4.7\pm 0.3\) & 94.5 & 6.4 \\  & 25 & \(24.3\pm 2.6\) & 97.2 & 10.9 & \(24.6\pm 1.2\) & 98.4 & 4.8 & \(23.5\pm 1.3\) & 94.0 & 5.5 \\  & 50 & \(48.7\pm 2.8\) & 97.4 & 5.7 & \(52.8\pm 3.6\) & 105.6 & 6.8 & \(49.4\pm 3.7\) & 98.7 & 7.6 \\  & 0 & ND & & ND & & & ND & & & ND \\ Myclobutanil & 5 & \(4.8\pm 0.3\) & 95.3 & 6.5 & \(5.0\pm 0.2\) & 100.5 & 3.2 & \(5.0\pm 0.3\) & 100.7 & 5.3 \\  & 25 & \(24.2\pm 1.3\) & 96.9 & 5.4 & \(24.8\pm 0.8\) & 99.2 & 5.3 & \(24.7\pm 1.9\) & 98.7 & 7.7 \\  & 50 & \(50.6\pm 1.6\) & 101.1 & 3.1 & \(49.6\pm 1.4\) & 99.1 & 2.8 & \(49.3\pm 1.2\) & 98.5 & 2.5 \\  & 0 & ND & & ND & & & ND & & & \\ Diniconazole & 5 & \(5.2\pm 0.2\) & 103.1 & 3.5 & \(4.3\pm 0.2\) & 85.2 & 5.1 & \(5.2\pm 0.3\) & 104.9 & 6.5 \\  & 25 & \(23.9\pm 0.7\) & 95.5 & 2.8 & \(24.3\pm 0.5\) & 97.3 & 1.9 & \(23.9\pm 1.8\) & 95.4 & 7.6 \\  & 50 & \(51.9\pm 3.6\) & 103.8 & 6.9 & \(48.7\pm 3.0\) & 97.3 & 6.2 & \(52.7\pm 0.9\) & 105.3 & 1.7 \\  & 0 & ND & & ND & & & & & & \\ Lambda-cylahtri & 5 & \(4.4\pm 0.2\) & 88.8 & 3.8 & \(5.0\pm 0.2