Bound residues most generally are known as residues unavailable and therefore depleted from the system. It follows that there must be a link with the extraction techniques and mechanisms of binding. Residues desorbed or extracted from soil with 0.01 M CaCl2(aq) provide an assessment of bioavailability and might be used in an aerobic soil metabolism study to assess aged bioavailability of the residues. We evaluated the extraction or release of residues in soils using 0.01 M CaCl2(aq) followed by extraction using a wide variety of solvent systems, and compared these to extraction using the solvent systems without the initial 0.01 M CaCl2(aq) treatment. A range of soil types and organic contents were tested with representative test compounds. The initial 0.01 M CaCl2(aq) treatment can have substantial effects, decreasing the apparent extractability of the residues from the soil.

Effect of bioavailability testing of soil residues using 0.01 M CaCl<sub>2</sub>(aq)<sub> </sub>equilibration on the subsequent extractability of the residues

244th National Meeting (2012)

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Effect of bioavailability testing of soil residues using 0.01 M CaCl2(aq) equilibration on the subsequent extractability of the residues

Effect of bioavailability testing of soil residues using 0.01 M CaCl₂(aq)equilibration on the subsequent extractability of the residues