Table 19: Dependence of LLE efficiency on water sample pH at 100 ng l-1 (n = 5).
| Recovery ± s (%) | ||
| Adjusted pH | Sulcofuron | Flucofuron |
| Blank | N.D. | N.D. |
| 1 | 44.5 ± 5.8 | 42.5 ± 4.5 |
| 2 | 73.2 ± 6.7 | 112.4 ± 8.6 |
| 4 | 51.8 ± 8.2 | 117.0 ± 10.1 |
| 7 | 51.9 ± 16.9 | 114.1 ± 11.6 |
*N.D. = Not detected (less than the LOD).