Optimizing exposure data collection for plant protection products: identifying ideal collectors with the fluorescent dye pyranine

• DOI: 10.1007/s00003-024-01498-5
• Publication Date: 2024-03-05T15:02:33Z
• Authors: Annika Ehmke; Jens Karl Wegener; Andreas Melfsen; Eberhard Hartung
• Keywords: Pyranine; Petri dish

Abstract When approving plant protection products, exposure data are required for risk analysis. Exposure can be collected various pathways, such as dermal, inhalation or ground sediment. For measuring exposures, pyranine, a fluorescent dye, and collector used. However, the choice of material depends on specific pathway. This study aims to determine most suitable collector, in combination with tracer recording through different pathways practical trials. Seven collectors (Tyvek ® , labels, plastic patches, paper nylon filters, fibreglass petri dishes) were subjected laboratory field tests assess quality parameters. Blank values, recovery rates, storability, fluorescence degradation under UV-radiation measured. Based results, matrix was created summarizing which might best suited capture each Almost all demonstrated high rates 100%; labels patches filters 95%; fiberglass 60.9%) well good storability. Furthermore, plastic-based (labels, Tyvek showed very rate above 95% when exposed UV-radiation. not utilization conditions due rapid (recovery rate: 20–56%). Nevertheless, stable recoveries protected used exposures these conditions. Fibreglass 84–86%, well-suited testing inhalative outdoors correction factor applied. detecting total dermal is its characteristics availability variety sizes. Finally, dishes ideal collecting sediments.