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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 analysis introduce significant plastic contamination at multiple steps — filtration, digestion, and transfers — that can distort environmental measurements, while the EcoExposure field platform reduces this by using glass collection and minimal plastic contact. Addressing workflow contamination is critical for generating reliable data on microplastic exposure levels in drinking water and other human-relevant matrices.
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.