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- Title
Development of a New Dislodgeable Foliar Residue Analytical Laboratory Method for Pesticides.
- Authors
Badawy, Mohamed H; Murnane, Darragh; Lewis, Kathleen A; Morgan, Neil
- Abstract
The dislodgeable foliar residue (DFR) is the amount of pesticide that exists on foliage after the pesticide has dried and which could dislodge to the skin or clothes of workers and is a key parameter for non-dietary risk assessments required to demonstrate safe use for pesticide registration. DFR data in the literature are described as insufficiently reliable, limited, and encompasses considerable statistical uncertainties. The purpose of this article is to describe a newly developed laboratory method for the quantification of DFR with an illustrative example. The laboratory method reflected available field DFR methodology but involved controlled application of droplets to leaves and validation of the wash-off process used to remove the residue from the leaf surface before the analytical quantification. A very high level of accuracy (99.7–102.1%) and precision (±1.5%) was achieved. Residue data generated from the illustrated application of the method showed a robust normal distribution, unlike field studies. The method is deemed to be controllable, cost-efficient, and time-saving, taking hours rather than days. This enables the generation of more data to allow extrapolation between the generated data by investigating multiple factors that may influence DFR. An improved understanding of DFR could save time, money, and resources.
- Subjects
PESTICIDE analysis; FOLIAR diagnosis; RISK factors of environmental exposure; DRUG residues; RESEARCH evaluation; OCCUPATIONAL exposure; RISK assessment; SENSITIVITY &; specificity (Statistics); ANALYTICAL chemistry; AGRICULTURAL laborers
- Publication
Annals of Work Exposures & Health, 2022, Vol 66, Issue 8, p1070
- ISSN
2398-7308
- Publication type
Article
- DOI
10.1093/annweh/wxac045