Microplastic quantification in environmental samples with complex organic matrices by diffusion NMR
Marcel Günther1, Jutta Meier1, Wolfgang Imhof1
1Institute of Integrated Natural Sciences, University Koblenz, Universitätsstr.1, D, 56070, Koblenz, Germany.
This study presents an accessible method for analyzing microplastics (MPs) using quantitative nuclear magnetic resonance (qNMR) spectroscopy. The protocol simplifies MP preparation for environmental samples, enabling more detailed analysis of mixtures.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Polymer Science
Background:
- Microplastic (MP) research requires advanced detection and quantification methods.
- Current techniques struggle to analyze all polymer types, necessitating combined approaches.
- Quantitative nuclear magnetic resonance (qNMR) spectroscopy offers structural analysis and precise quantification of MPs but is underutilized in environmental studies.
Purpose of the Study:
- To introduce an easy-to-apply preparation protocol for environmental qNMR analysis of microplastics.
- To adapt qNMR for use with affordable benchtop devices.
- To enable more detailed analysis of MP mixtures in environmental samples through semi-quantitative diffusion sequence investigation.
Main Methods:
- Development of an organic matrix removal protocol for environmental samples.
- Adaptation of qNMR techniques for benchtop devices.
- Investigation of diffusion sequences for semi-quantitative analysis of MP mixtures.
Main Results:
- An accessible preparation protocol for environmental qNMR analysis of microplastics was established.
- The method was successfully transferred to affordable benchtop devices.
- Semi-quantitative analysis of MP mixtures using diffusion sequences was demonstrated.
Conclusions:
- The developed protocol facilitates the application of qNMR in environmental microplastic research.
- This advancement allows for more comprehensive and accessible microplastic characterization.
- The study enhances the capability to analyze complex microplastic mixtures in environmental matrices.
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