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Transport of Pesticides in Particulate matter-analytical support. - PL0506

This project is a collaborative undertaking with
ADAS(PL0505), SSLRC (PL0507) and IFE/PRIS (PL0513).It is
wholly dependent on the ADAS project.

The fundamental problem to be addressed has been fully described in the ADAS report ' Particulate Transport of Pesticides', Parts 1 & 2, G L Harris, 28 March 1994. Details of the R&D proposed are described in the associated ADAS ROAME. ADAS are establishing field scale and catchment based studies to compare the transport of pesticides in surface run - off and in drainage waters. It is clear that the measurement of pesticide residues in such water samples is a cornerstone of this work. Reliable measurements of pesticide concentrations are essential to meeting the objectives of : determining the movement of pesticide residues in river systems ; determining the field scale processes influencing the mode of pesticide transport ; and testing the effectiveness of appropriate agricultural control measures ( eg buffers ). It is equally important that modelling studies are supported with reliable data.

Consequently CSL is required to validate all the procedures which produce the final measurements, these include sample handling and storage as well as those associated with the analytical measurements. In order to provide both reliable data and cost effectiveness analysis the analytical quality control measures will be tailored to give appropriate confidence in all of the measurements. In the field scale studies, where the application of a pesticide is both known and controlled within the project, residues will be expected and confirmation of identity can be restricted to spot checking. However in the catchment studies ( and in the first year of the ' new ' Boxworth site ) the identity of any residues present in samples will need to be adequately confirmed in all cases. In the past the number of analyses possible within the recources available has been the principle limiting factor in experiments such as these. Therefore it is important to find ways of increasing analytical productivity so as to maximise the amount of data generated. However, any method development and/or modification and subsequent validation required in support of this project will be conducted under the CSL companion ROAME PL0502 ' Development of Analytical Methods for the Determination of Pesticide Residues in Water ' .
To analyse the largest number of samples possible (within the agreed resources ) for all of the required pesticides so as to produce the best possible body of data from the experiments. To do this it will be necessary to influence the experiment and treatment designs (ie choice of pesticides applied in the field studies ) to facilitate the analyses without compromising any other aspects of the experiments.

To deploy new techniques and technologies to improve the quantity and quality of the analytical data produced. However, new procedures can be deployed only after they have been fully developed and validated (companion ROAME PL0502 ) and they may be applicable to a restricted range of pesticides.

To advise on experimental design, especially sampling, and its effects on the statistical analysis of results and thereby on the reliability of the conclusions drawn from the experiments.

To interpret the analytical data produced by other collaborators and other workers in the field , including an assessment of the analytical quality of the measurements made.

To contribute appropriately to the preparation of joint publications.

To complete the analysis of samples from the final hydrological year of sampling.
Time-Scale and Cost
From: 1994

To: 1998

Cost: £268,463
Contractor / Funded Organisations
Central Science Laboratory
Arable Farming              
Fields of Study
Pesticide Safety