Journal
ANALYTICAL METHODS
Volume 11, Issue 17, Pages 2277-2285Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ay00252a
Keywords
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Funding
- Deutsche Forschungsgemeinscha. (DFG) [391977956 - SFB 1357]
- German Federal Ministry of Education and Research (project PLAWES) [03F0789A]
- TU Wien University Library
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A new yet little understood threat to our ecosystems is microplastics. These microscopic particles accumulate in our oceans and in the end may find their way into the food chain. Even though their origin and the laws governing their formation have become ever more clear fast and reliable methodologies for their analysis and identification are still lacking or at an early stage of development. The first automatic approaches to analyze mFTIR images of microplastics which have been enriched on membrane filters are promising and provide the impetus to put further effort into their development. In this paper we present a methodology which allows discrimination between different polymer types and measurement of their abundance and their size distributions with high accuracy. In particular we apply random decision forest classifiers and compute a multiclass model for the polymers polyethylene, polypropylene, poly(methyl methacrylate), polyacrylonitrile and polystyrene. Further classification results of the analyzed mFTIR images are given for comparability. The study also briefly discusses common issues that can arise in classification such as the curse of dimensionality and label noise.
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