Table 4.6 Amounts of stock solution added and resulting nominal and measured concentrations Test tube Sediment Conc level Stock solution added µL Nominal conc. in bottle µg/L Measured conc. µg/L Pendimethalin pelagic No sediment High 250 54.5 54.4 Pendimethalin pelagic No sediment Low 125 27.3 27.3 Pendimethalin suspended sediment Odderbæk Low 125 27.3 27.3 Pendimethalin suspended sediment Lillebæk Low 125 27.3 27.3 Ioxynil pelagic No sediment High 500 37.5 43.5 Ioxynil pelagic No sediment Low 250 18.75 21.7 Ioxynil suspended sediment Odderbæk Low 250 18.75 21.7 Ioxynil suspended sediment Lillebæk Low 250 18.75 21.7 Bentazone pelagic No sediment High 600 9.0 13.5 Bentazone pelagic No sediment Low 300 4.5 6.75 Bentazone suspended sediment Odderbæk Low 300 4.5 6.75 Bentazone suspended sediment Lillebæk Low 300 4.5 6.75