scholarly journals Quantitative analysis of micro- and nano-plastics in environmental samples using pressurised liquid extraction followed by pyrolysis gas chromatography mass spectrometry

2021 ◽  
Author(s):  
Elvis Dartey Okoffo ◽  
Francisca Ribeiro ◽  
Stacey O’Brien ◽  
Stephen Burrows ◽  
Tania Toapanta ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Quantitative Analysis ◽  
Environmental Samples ◽  
Liquid Extraction ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Pyrolysis Gas Chromatography ◽  
Chromatography Mass Spectrometry ◽  
Pressurised Liquid Extraction

scholarly journals Comparison of pyrolysis gas chromatography/mass spectrometry and hyperspectral FTIR imaging spectroscopy for the analysis of microplastics

2020 ◽  
Vol 412 (30) ◽  
pp. 8283-8298 ◽  
Author(s):  
Sebastian Primpke ◽  
Marten Fischer ◽  
Claudia Lorenz ◽  
Gunnar Gerdts ◽  
Barbara M. Scholz-Böttcher
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Environmental Samples ◽  
Imaging Spectroscopy ◽  
Polymer Composition ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Ftir Imaging ◽  
Pyrolysis Gas Chromatography ◽  
Chromatography Mass Spectrometry

AbstractAnalysis of microplastics (MP) in environmental samples is an emerging field, which is performed with various methods and instruments based either on spectroscopy or thermoanalytical methods. In general, both approaches result in two different types of data sets that are either mass or particle number related. Depending on detection limits of the respective method and instrumentation the derived polymer composition trends may vary. In this study, we compare the results of hyperspectral Fourier-transform infrared (FTIR) imaging analysis and pyrolysis gas chromatography-mass spectrometry (Py-GC/MS) analysis performed on a set of environmental samples that differ in complexity and degree of microplastic contamination. The measurements were conducted consecutively, and on exactly the same sample. First, the samples were investigated with FTIR using aluminum oxide filters; subsequently, these were crushed, transferred to glass fiber filters, in pyrolysis cups, and measured via Py-GC/MS. After a general data harmonization step, the trends in MP contamination were thoroughly investigated with regard to the respective sample set and the derived polymer compositions. While the overall trends in MP contamination were very similar, differences were observed in the polymer compositions. Furthermore, polymer masses were empirically calculated from FTIR data and compared with the Py-GC/MS results. Here, a most plausible shape-related overestimation of the calculated polymer masses was observed in samples with larger particles and increased particle numbers. Taking into account the different measurement principles of both methods, all results were examined and discussed, and future needs for harmonization of intermethodological results were identified and highlighted.

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