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Establishment of a Spectral Detection Method for Microfluoroplastics: Revealing Widespread Pollution and Conventional Digestion-Induced Underestimation
Summary
Scientists discovered that common lab methods for measuring microplastics have been missing a whole category called "microfluoroplastics" (tiny bits of Teflon-like plastics), causing pollution levels to be undercounted by nearly half. Using a new, more sensitive detection method, they found these plastic particles show up in dust, water, and sediment worldwide—and notably, in food cooked with nonstick pans, suggesting a direct and previously unrecognized way these plastics can enter our bodies. This matters because it means our true exposure to microplastics from everyday cookware may be higher than previously thought, though more research is needed to
Fluoroplastics are extensively used worldwide, yet their environmental occurrence as microfluoroplastics (MFPs) remains poorly understood due to limited analytical methods. Herein, we collected standard spectra of six typical MFPs with different morphologies and particle sizes and constructed two spectral libraries for MFP detection: a full-series microplastics spectral library (library 1) and a proprietary MFP spectral library (library 2). Recovery tests verified high recognition accuracy for both pristine and aged MFPs. Meanwhile, an optimized rapid extreme digestion method for MFP pretreatment was established. Applied in conjunction with library 1, field detection showed MFP abundances were nearly doubled, demonstrating severe underestimation by conventional H 2 O 2 digestion. High abundances of MFPs were detected in food prepared with nonstick cookware, revealing a unique human exposure pathway to MFPs. In addition, more than 800,000 published particle spectra from indoor and outdoor dust across 39 Chinese cities, total suspended particulates from five Asian cities, and sediment samples at nine depth layers were reanalyzed using library 2. The six target MFPs were ubiquitously distributed, accounting for 1.6%–8.3% of the total microplastics. This work provides the first systematic MFP baseline data and highlights MFPs as a previously overlooked critical component of microplastic pollution.