Table 5 Presence of radioactivity in the different extracts of the sequential extraction (applied radioactivity 4.2 kBq 14C-cypermethrin per g soil dm corresponding to 120 mg cypermethrin per kg soil dm)
From: Certainties and uncertainties in accessing toxicity of non-extractable residues (NER) in soil
Soil | 0.01 m CaCl2 | Tenax20 | Tenax1 week | Acetonitrile shaking | PLE | NER | Total recovery | ||
|---|---|---|---|---|---|---|---|---|---|
Water | Tenax | Water | Tenax | ||||||
Test start | |||||||||
01-A | 0.1% | 0.3% | 41.5% | 0.4% | 22.5% | 17.6% | 1.0% | 0.3% | 83.7 |
02-A | 0.2% | 0.3% | 80.6% | 0.1% | 5.9% | 4.1% | 0.8% | 0.3% | 92.3 |
03-G | 0.2% | 0.5% | 42.0% | 0.3% | 26.4% | 21.3% | 2.9% | 0.5% | 94.1 |
T = 6 months | |||||||||
01-A | 0.8% | 0.0% | 15.6% | 0.7% | 26.5% | 30.7% | 1.2% | 1.4% | 76.9% |
02-A | 0.6% | 0.0% | 16.5% | 0.8% | 34.0% | 34.7% | 2.7% | 2.3% | 91.6% |
03-G | 2.0% | 0.4% | 13.7% | 0.5% | 17.5% | 31.8% | 5.4% | 6.4% | 77.7% |