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Related Experiment Video

Updated: Jan 13, 2026

Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis
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A Robust Multistep Digestion Method for Microplastics Detection in Human Tissue by MicroRaman Analysis.

Jennifer P Pascali1, Lucio Litti2, Arianna Fornasari1

  • 1Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy.

Drug Testing and Analysis
|January 7, 2026
PubMed
Summary
This summary is machine-generated.

This study developed an optimized 3-day protocol for extracting microplastics (MPs) from diverse human tissues. The new method ensures MP integrity and clear digestates for reliable analysis, advancing human exposure assessments.

Keywords:
digestionhuman tissuemicroplasticspolyamidesprotocol

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Area of Science:

  • Environmental Science
  • Toxicology
  • Analytical Chemistry

Background:

  • Microplastic (MP) contamination in human tissues is a growing concern.
  • Reliable extraction and analysis of MPs from complex human tissues are challenging.
  • Existing single-reagent digestion protocols are often ineffective, leading to incomplete tissue breakdown or filtration issues.

Purpose of the Study:

  • To systematically evaluate and optimize digestion protocols for efficient MP extraction from various human tissues.
  • To develop a robust method that preserves MP integrity and facilitates filtration.
  • To enable accurate human exposure assessment and toxicological studies.

Main Methods:

  • Evaluation of single-reagent protocols (nitric acid, proteinase K, Fenton digestion).
  • Development and optimization of a combined 3-day digestion protocol involving Fenton digestion, enzymatic digestion (proteinase K), and lipid removal (ethanol/sonication).
  • Application of optical microscopy and Raman spectroscopy for MP characterization.

Main Results:

  • The optimized 3-day protocol effectively digested complex human tissues (placenta, lung, kidney, etc.), yielding clear digestates.
  • The protocol reduced filter clogging and preserved common MP polymers (LDPE, PET, PTFE, PA6, PA12).
  • The method demonstrated improved reproducibility and reliability compared to single-reagent protocols.

Conclusions:

  • An efficient and robust 3-day digestion protocol was established for microplastic analysis in human tissues.
  • This optimized method facilitates the isolation and characterization of microplastics, crucial for human health risk assessment.
  • The protocol supports advancements in understanding human exposure and the toxicological impacts of microplastic contamination.