Table 3: Data correlation between GC/NICI-MS and ELISA for permethrin in sediment from the River calder catchment, West yorkshire, UK.
| Site | GC/NICI-MS (µg kg-1) | ELISA (µg kg-1) |
| C25007 | 3.0 | NDa |
| C25008 | 878 | 750 |
| C25009 | 134.4 | 85 |
| C250010 | 2936 | 3100 |
| C250011 | 31.6 | 12.5 |
| C250013 | 928 | 820 |
aNot detected.