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).