On 30 June 2022, the OECD published test guideline No. 320: ‘Determining anaerobic transformation of chemicals in liquid manure’. This guideline describes a standardised method to investigate transformation of chemical substances in pig and cattle liquid manure under anaerobic conditions. The experiments are performed to determine the rate of transformation of the test substance, the […]
Spreading of manure on agricultural soils represents an important pathway by which veterinary medicinal and biocidal products enter the environment. To assess their environmental impact in the context of authorisation processes, experimental testing of transformation of these compounds in manure is considered in regulatory guidance documents. However, there is no standardised experimental test method available […]
The aim of the present project was to further develop a draft test guideline for an experimental method to study the transformation of veterinary pharmaceuticals and biocides in cattle and pig liquid manure, and to validate it in an international inter-laboratory comparison (ring test).
The environmental fate of a compound is determined by transformation and distribution processes, which are strongly dependent on the specific environmental conditions. Biodegradability of chemicals in different environmental compartments is one of the major determinants of their environmental fate and therefore plays a crucial role in regulatory decision-making. Simulation studies according to OECD 308 (aquatic […]
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T. Junker