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Updated: Jun 26, 2026

Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis

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Published on: July 1, 2017

Optimization of tablet processing as a reference material for microplastic detection methods.

Mara Putzu^1,2, Yosri Wiesner³, Christiane Weimann³

¹Istituto Nazionale Di Ricerca Metrologica (INRiM), Strada Delle Cacce 91, 10135, Turin, Italy.

Analytical and Bioanalytical Chemistry

|December 11, 2025

Summary

This summary is machine-generated.

This study developed optimized polypropylene microplastic reference materials in water-soluble tablets. These materials ensure accurate microplastic quantification for environmental monitoring, meeting EU standards.

Keywords:

Analytical methods Identification Plastic polymer Polypropylene Quantification Validation

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Area of Science:

Environmental Science
Analytical Chemistry
Materials Science

Background:

Microplastic (MP) quantification requires reliable reference materials (RMs) for method validation.
Harmonized approaches are crucial for monitoring MPs in complex matrices, aligning with EU directives.
Polypropylene (PP) is a common microplastic pollutant.

Purpose of the Study:

To optimize the production of polypropylene microplastic reference materials in water-soluble tablet form.
To evaluate the homogeneity and stability of the produced reference materials.
To support the development of standardized methods for microplastic analysis.

Main Methods:

Cryomilling of PP particles (1-100 µm) and embedding in a lactose/PEG matrix.
Optimization of tablet production by varying matrix component size and mixer instrument.
Characterization using thermogravimetric analysis (TGA), TED-GC/MS, Py-GC/MS, micro-Raman spectroscopy, laser diffraction, SEM, and ATR-FTIR.

Main Results:

An optimized protocol yielded PP RMs with a homogenous mass of 19 µg (SD 4 µg, RSD 19%).
Materials demonstrated good homogeneity and stability over a 4-month period.
Characterization confirmed suitability for quality control and method performance studies.

Conclusions:

The developed water-soluble PP microplastic tablets serve as effective reference materials.
This advancement supports standardization in microplastic quantification for environmental monitoring.
The optimized protocol facilitates comparable and harmonized approaches for microplastic analysis.