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Urine Color Differences Do Not Interfere with Optical Analysis in the EcoExposureTM Microplastic and Nanoplastic Assay

Zenodo (CERN European Organization for Nuclear Research) 2026

Summary

Researchers observed that natural variation in urine color did not prevent reliable optical pattern detection in the EcoExposure microplastic assay, supporting the feasibility of smartphone-based urine testing for microplastic and nanoplastic exposure in decentralized or field settings.

A common concern in image-based urine assays is that natural variation in sample color or background opacity may prevent reliable optical interpretation. In a preliminary comparison, human urine evaluated before and after particulate-reduction filtration showed clear differences in baseline coloration, yet both conditions retained readable optical pattern structure under the assay workflow. These observations suggest that moderate matrix color differences do not necessarily abolish practical optical readout, supporting the feasibility of decentralized smartphone-compatible urine testing

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