Quantification of microplastics using quantitative NMR spectroscopy | University of Koblenz

Microplastics (MP) are an increasingly significant problem for the environment and are now present globally. To understand the distribution and impact of MP on the environment, it is important to identify and quantify MP over a wide size range. Until now, microplastic particles (MPP) in environmental samples have been identified and quantified mainly by FTIR or Raman spectroscopy or by e.g. pyrolysis-GC/MS methods. In recent years, we have been able to establish quantitative NMR spectroscopy as a further method that allows size-independent, rapid and simple quantitative analysis of MPP and makes it possible to specify a concentration of MP in environmental samples, for example in mg MP per g environmental sample.

Publications

Peez, N., Janiska, M.-C., Imhof, W. (2019) The first application of quantitative ¹H-NMR-Spectroscopy as a simple and fast method of identification and quantification of microplastic particles (PE, PET and PS). Anal. Bioanal. Chem. 441, 823.

Peez, N., Becker, J., Ehlers, S., Fritz, M., Fischer, C.B., Koop, J.H.E., Winkelmann, C., Imhof, W. (2019) Quantitative analysis of PET microplastics in environmental model samples using quantitative NMR spectroscopy: Validation of an optimized and consistent clean-up method. Anal. Bioanal. Chem. 441, 7409.

Peez, N., Imhof, W. (2020) Quantitative ¹H-NMR spectroscopy as an efficient method for identification and quantification of PVC, ABS and PA microparticles. Analyst 145, 5363.

Peez, N., Rinesch, T., Kolz, J., Imhof, W. (2021) Applicable and cost-efficient microplastic analysis by quantitative ¹H-NMR spectroscopy using benchtop NMR and NoD methods. Magn. Res. Chem. 60, 172.

Günther, M., Imhof, W. (2023) Simultaneous quantification of microplastic particles by NoD ¹H-qNMR from samples comprising different polymer types. Analyst 148, 1151.

Seghers, J., Günther, M., Breidbach, A., Peez, N., Imhof, W., Emteborg, H. (2023) Feasibility of using quantitative ¹H-NMR spectroscopy and ultra-micro balances for investigation of a PET microplastics reference material. Anal. Bioanal. Chem. 415, 3033.

Günther, M., Imhof, W. (2024) Highly selective solid liquid extraction of microplastic mixtures as a pre-preparation tool for quantitative nuclear magnetic resonance spectroscopy studies. Analyst 149, online ahead of print.

Fundings & Partners

Participating organizational units

Organic Chemistry Groupuni-koblenz.de/en/mathematics-...

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