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In-vivo measurement of ingested microplastics using spectroscopic and polarization-based full-Stokes microscopy

2022
Nobuaki Endo, Yukitoshi Otani, Nathan Hagen

Summary

Researchers measured the optical property called birefringence in five types of plastic particles (polystyrene, PET, LDPE, PMMA, and polypropylene) using a specialized polarization camera. Each plastic type showed a distinct birefringence signature, suggesting this technique could be used to identify and count different types of microplastics in biological tissue samples.

Polymers
LDPE PET PMMA PP PS
Study Type In vivo

In this report, birefringence of polystyrene and PET was measured using a full-Stokes polarization camera. In addition, using an AxoScan spectroscopic Mueller matrix polarimeter, we measured the birefringence of five types of plastics: PS, LDPE, PMMA, PP, and PET, and found that they exhibit different birefringence dispersion characteristics. Thus, the measurement of birefringence is useful for differentiating and quantifying microplastics.

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