Titanium dioxide-based DGT for measuring dissolved As(V), V(V), Sb(V), Mo(VI) and W(VI) in water

► Metsorb-DGT accurately measured all anions in freshwater and all, except Mo(VI), in seawater. ► Metsorb-DGT was superior to ferrihydrite-DGT for measuring Mo(VI) and Sb(V) in freshwater. ► Metsorb-DGT was superior to ferrihydrite-DGT for measuring Mo(VI), Sb(V) and W(VI) in seawater. ► Neither Metsorb-DGT nor ferrihydrite-DGT accurately measured Mo in seawater for times >24 h. ► Comprehensive laboratory evaluation of DGT methods prior to field use is critical