A new approach to using Diffusive Gradient in Thin-films (DGT) labile concentration for Water Framework Directive chemical status assessment: adaptation of Environmental Quality Standard to DGT for cadmium, nickel and lead

Environmental Sciences Europe

Table 5 Application of Eq. (2) for predicting Cd, Ni and Pb dissolved concentrations from DGT results

	Mean predicted [M]_{dissolved concentration} (ng L⁻¹)	Highest predicted [M]_{dissolved concentration} (HPI 95%) (ng L⁻¹)	Validity range (ng L⁻¹)
Cadmium	[Cd]_{Dissolved concentration} = 0.67 [Cd]_DGT + 6	[Cd]_{Dissolved concentration} = 0.68 [Cd]_DGT + 17	[Cd]_DGT: [< LQ, 75]
Nickel	[Ni]_{Dissolved concentration} = 0.41 [Ni]_DGT + 217	[Ni]_{Dissolved concentration} = 0.44 [Ni]_DGT + 645	[Ni]_DGT: [< LQ, 2128]
Lead	[Pb]_{Dissolved concentration} = 0.77 [Pb]_DGT + 72	[Pb]_{Dissolved concentration} = 0.84 [Pb]_DGT + 292	[Pb]_DGT: [< LQ, 327]