Atrazine and prometryne belong to the most widely used group of herbicides, the triazines.
There are only limited data available on the behaviour of prometryne, atrazine, and its main metabolites, DEA and DIA, in Australian soils, and no Australian data studying the influence of land use on sorption behaviour of any chemicals.
Analytical grade chemicals (atrazine 99% and prometryne 99%) were obtained from Chem Service Pennsylvania, USA, and the atrazine metabolites, DEA and DIA (both 98% purity), were provided by Novartis, USA.
The single concentration used during the sorption study for atrazine, DEA, and DIA was 2 mg/L and for prometryne was 3 mg/L.
0 mg/L; and prometryne at the following concentrations: 2.
Prometryne was determined using the following conditions: [C.
Generally a better fit for the multipoint data for atrazine and prometryne was observed with the Freundlich model than with the linear model (Table 2).
Prometryne, atrazine, DEA, and DIA sorbed to a significantly (P < 0.
Generally, prometryne was sorbed to a greater extent (as indicated by larger [K.
oc] of prometryne and pH was significant (P < 0.
The prometryne data in this study agreed reasonably well with the model at pH >5, which implies that the compound is in a neutral or anionic fore1 at these pH values, and the majority of sorption can be explained by assuming sorption is primarily to OC.