Research Article
Rapid Simultaneous Determination of 43 Pesticide Residues in Schizonepeta tenuifolia by Gas Chromatography Mass Spectrometry
Table 1
Retention times, target ions, and qualifier ions of the selected pesticides.
| Pesticide | Retention time | Target ion | Qualifier ion 1 | Qualifier ion 2 | Qualifier ion 3 |
| Dichlorvos | 5.53 | 109 | 185 | 220 | | Carbofuran | 6.03 | 164 | 122 | 123 | | Methamidophos | 6.18 | 94 | 95 | 126 | | Ethoprophos | 10.60 | 158 | 200 | 242 | | Omethoate | 11.58 | 156 | 110 | 126 | | Phorate | 11.63 | 121 | 231 | 260 | | Hexachlorobenzene | 12.07 | 284 | 286 | 282 | | α-BHC | 12.40 | 219 | 183 | 221 | 254 | Monocrotophos | 12.96 | 127 | 109 | 192 | | Quintozene | 13.50 | 237 | 249 | 295 | | γ-BHC | 13.87 | 183 | 219 | 221 | 254 | Dimethoate | 14.03 | 87 | 93 | 125 | | Acetochlor | 15.07 | 146 | 162 | 223 | | β-BHC | 15.12 | 219 | 217 | 181 | 254 | Prometryn | 16.14 | 241 | 184 | 226 | | δ-BHC | 16.22 | 219 | 181 | 217 | 254 | Metalaxyl | 16.42 | 206 | 234 | 249 | | Chlorothalonil | 16.52 | 266 | 231 | 194 | | Aldrin | 16.52 | 263 | 265 | 329 | 293 | Chlorpyrifos | 17.31 | 314 | 258 | 286 | | Parathion | 17.98 | 291 | 186 | 235 | | Dicofol | 18.60 | 139 | 141 | 252 | 250 | Pendimethalin | 18.81 | 252 | 220 | 162 | | cis-Heptachlor epoxide | 19.00 | 353 | 351 | 355 | | trans-Heptachlor epoxide | 19.34 | 353 | 351 | 355 | | cis-Chlordane | 20.12 | 373 | 375 | 377 | | trans-Chlordane | 20.53 | 373 | 375 | 377 | | Thiamethoxam | 20.88 | 182 | 212 | 247 | | pp'-DDE | 21.73 | 318 | 316 | 246 | 248 | Dieldrin | 22.10 | 263 | 277 | 345 | 380 | Fludioxonil | 23.39 | 248 | 127 | 154 | | op'-DDT | 23.50 | 235 | 237 | 165 | 199 | Nitrofen | 23.60 | 283 | 139 | 202 | | pp'-DDD | 23.89 | 235 | 237 | 165 | 199 | β-Endosulfan | 24.21 | 241 | 265 | 339 | | Propiconazole | 24.62 | 259 | 173 | 261 | | pp'-DDT | 24.65 | 235 | 237 | 165 | 246 | Bifenthrin | 24.92 | 181 | 165 | 166 | | Fenpropathrin | 25.75 | 181 | 265 | 349 | | Cyhalothrin | 26.40 | 181 | 197 | 141 | | Cypermethrin | 29.88 | 181 | 152 | 180 | | Fenvalerate | 32.06 | 167 | 181 | 225 | 419 | Difenoconazole | 34.88 | 323 | 325 | 265 | |
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