Maximum residue levels:Fact or fiction?

Hyder, Kieran ORCID:, Travis, Kim Z., Welsh, Zoe K. and Pate, Ian (2003) Maximum residue levels:Fact or fiction? Human and Ecological Risk Assessment, 9 (3). pp. 721-740. ISSN 1080-7039

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Maximum residue levels (MRLs) are trading standards that represent the maximum residue that could be found if a crop protection product (CPP) is applied according to critical good agricultural practice (cGAP). Foodstuffs are monitored for MRL compliance and exceedence can have economic, social and political consequences. There is a trade-off when calculating MRLs, as low MRLs prevent misuse of CPPs and high MRLs prevent an 'unlucky' fanner exceeding the MRL by chance. Chance exceedence has not been previously investigated despite the high probability of exceedence due to small data sets and calculation method. In this study, MRL calculation methods were investigated and policy for using these methods to control chance exceedence was defined. The shape and parameters of the residue distribution, LOQ and number of trials all affected the accuracy and precision of the estimated MRL. The two European methods were least accurate and precise at small numbers of trials and high CVs, with up to four different MRLs possible. Eight to 16 trials gave the best estimate of the MRL, but exceedence by chance could occur in up to 45% of samples. Policy was defined for using existing methods, and involved calculation of the MRL by both methods and taking the highest.

Item Type: Article
Uncontrolled Keywords: crop protection product,eu regulation,maximum residue levels (mrls),residues,setting mrls,simulation modelling,ecological modelling,pollution,health, toxicology and mutagenesis ,/dk/atira/pure/subjectarea/asjc/2300/2302
Faculty \ School: Faculty of Science > School of Environmental Sciences
UEA Research Groups: Faculty of Science > Research Groups > Collaborative Centre for Sustainable Use of the Seas
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Depositing User: LivePure Connector
Date Deposited: 25 Nov 2023 03:24
Last Modified: 28 Nov 2023 03:01
DOI: 10.1080/713609964

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