Table 1 Retention times, quantification ions, and qualification ions for insecticide residue analyses by GC-MS.
| Insecticide | Retention time (min) | Quantification ion | Qualifying ion |
|---|---|---|---|
| Fipronil | 23.00 | 367 | 213 |
| Piperonyl butoxide | 28.90 | 176 | 149 |
| Tetramethrin | 29.95–30.30 | 164 | 123 |
| Permethrin (cis- and trans-) | 35.35–35.80 | 183 | 163 |
| Cypermethrin | 38.50–39.40 | 163 | 181 |