John Wiley & Sons, Ltd.

Interpretation of aged sorption studies for pesticides and their use in EU regulatory leaching assessments

0
First‐tier regulatory exposure assessments for pesticides assume that pesticide sorption is instantaneous and fully reversible. In EU regulatory guidance, an increase in sorption over time (‘aged sorption’) can be considered at the higher tier to refine predicted environmental concentrations in groundwater. Research commissioned by the UK Chemicals Regulation Directorate (CRD), funded by Defra, formed the basis of a draft regulatory guidance document proposing (i) a protocol on how to measure aged sorption of parent compounds in laboratory studies, (ii) procedures to fit kinetic models to the experimental data, (iii) criteria to test the reliability of the parameters, and (iv) procedures for use of the parameters in the groundwater exposure assessment. The draft guidance was revised after feedback from stakeholders and testing of the guidance was performed against real datasets by an independent consultancy. CRD submitted the revised document to the European Food Safety Authority (EFSA) for scrutiny. This article gives an overview of the draft guidance and explains the reasoning behind the recommendations made. This article is protected by copyright. All rights reserved

Customer comments

No comments were found for Interpretation of aged sorption studies for pesticides and their use in EU regulatory leaching assessments. Be the first to comment!