Journal
ANALYTICAL CHEMISTRY
Volume 94, Issue 25, Pages 9033-9039Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.2c01094
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Funding
- Australia Centre of Research on Separation Science (ACROSS)
- University of Tasmania
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This study reports a method for capturing microplastics and separating organic pollutants in a biphasic medium using a magnetic field, providing convenience for the analysis of multiple organic pollutants in solid mixtures.
Microplastics have the potential to adsorb organic pollutants due to their lipophilic nature. Evaluating the distribution of multiple organic pollutants in different types of microplastics coexisting in a sample is a strenuous and challenging analytical task. Here, we report position-dependent microplastic trapping in a biphasic medium comprising a paramagnetic aqueous donor phase containing the mixed microplastics and a diamagnetic organic acceptor phase. Depending on the relative height of the sample container positioned in a magnetic field, the selective density-dependent trapping of microplastics is achieved. Concurrently, the organic pollutants adsorbed on the microplastics are desorbed in the organic acceptor phase, which is easily solidified, separated, and transferred for organic pollutant determination by high-performance liquid chromatography. This facilitates analytical studies involving multiple organic pollutants distributed in solid heterogeneous mixtures.
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