Table 20: SPE efficiencies for sulcofuron and flucofuron and TCC extracted from water using different extraction cartridges and pH at 1 µg l-1.
| Recovery (%) | ||||
| Cartridge | pH | Sulcofuron | Flucofuron | TCC |
| CH | 2 | 49.7 | 63.6 | N.D.* |
| CH | 7 | 74.0 | 129.1 | 83.1 |
| C8 | 2 | 47.3 | 124.6 | N.D. |
| C18 | 7 | 74.3 | 127.3 | 59.3 |
| C18 | 2 | 49.3 | 86.1 | 50.7 |
| C18 | 7 | 70.7 | 113.1 | 86.3 |
| ENV+ | 2 | N.D. | 120.2 | 115.7 |
| ENV+ | 7 | N.D. | 105.8 | 68.5 |
| ENVl-CARB | 2 | N.D. | N.D. | N.D. |
| ENVl-CARB | 7 | N.D. | N.D. | N.D. |
*N.D. = Not detected (less than the LOD).