Issue 17, 2019

A methodology for the fast identification and monitoring of microplastics in environmental samples using random decision forest classifiers

Abstract

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 μFTIR 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 μFTIR 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.

Graphical abstract: A methodology for the fast identification and monitoring of microplastics in environmental samples using random decision forest classifiers

Supplementary files

Article information

Article type
Paper
Submitted
02 fev 2019
Accepted
25 mar 2019
First published
26 mar 2019
This article is Open Access
Creative Commons BY license

Anal. Methods, 2019,11, 2277-2285

A methodology for the fast identification and monitoring of microplastics in environmental samples using random decision forest classifiers

B. Hufnagl, D. Steiner, E. Renner, M. G. J. Löder, C. Laforsch and H. Lohninger, Anal. Methods, 2019, 11, 2277 DOI: 10.1039/C9AY00252A

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