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Potential Plastic Contamination Pathways in Conventional Lab-Based Analysis of Microplastics and Nanoplastics vs. EcoExposure™ Intentionally Designed Simple Low-Contamination Field-Deployable Smartphone Workflow
Summary
Conventional lab workflows for microplastic and nanoplastic analysis introduce contamination through multi-step filtration, chemical digestion, and plastic equipment contact, while a minimal-contact field platform using glass collection and smartphone imaging eliminates most plastic interfaces. Reducing workflow contamination is essential for generating accurate environmental measurements, particularly in drinking water monitoring where overestimates can distort exposure assessments.
Conventional laboratory workflows for microplastic and nanoplastic analysis rely on multi-step processes involving filtration, chemical digestion, transfer, and extensive contact with plastic laboratory materials. These steps introduce potential contamination pathways that can confound environmental measurements, even when samples are collected from water intended for human consumption or recreational use. In contrast, the EcoExposure platform employs an intentionally minimal-contact design—glass beaker collection, single-step reagent addition from a paper sachet, and direct smartphone imaging—eliminating most plastic interfaces and enabling immediate field assessment. This work distinguishes measurement-workflow contamination from controlled toxicology studies, which typically use defined polystyrene beads under controlled exposure conditions; polyethylene residues from gloves or equipment do not impact those results. The findings highlight how system-level design choices can reduce artifactual contamination and improve reliability in real-world environmental monitoring.