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Title: An assessment of the concentration of pharmaceuticals adsorbed on microplastics
Authors: Santana Viera, Sergio 
Montesdeoca Esponda, Sarah 
Torres Padrón, María Esther 
Sosa Ferrera, María Zoraida 
Santana Rodríguez, José Juan 
UNESCO Clasification: 2301 química analítica
2391 Química ambiental
Keywords: Microplastics
Ultrasound-assisted extraction
Beach pollution
Issue Date: 2021
Project: Evaluación del impacto de microplásticos y contaminantes emergentes en las costas de la Macaronesia 
Journal: Chemosphere 
Abstract: In the last decade, microplastics (MPs) have become an increasing cause for concerning. These particles are scattered throughout seas and oceans and have the capability of transporting adsorbed pollutants as pharmaceutical compounds, which can cause toxic effects and be transferred along the food chain. The development, optimization and validation of a sensitive and reliable analytical procedure for the extraction and determination of ten common pharmaceuticals adsorbed on MPs is reported in this study. This method involves ultrasound-assisted extraction coupled with ultra-high-performance liquid chromatography and tandem mass spectrometry. All of the variables included in the extraction process, such as the extraction time and type and solvent volume, were studied and optimised. Under optimal conditions, good reproducibility and repeatability, with relative standard deviations lower than 15% in most cases, were obtained while limits of detection between 0.25 and 15.8 ng g−1 were achieved. Last, the method was applied to the analysis of samples collected from beaches in the Canary Islands (Spain). The results indicated the presence of several analytes adsorbed on MPs in concentrations ranging from 34.0 to 111 ng g−1.
ISSN: 0045-6535
DOI: 10.1016/j.chemosphere.2020.129007
Source: Chemosphere [ISSN 0045-6535], v. 266, 129007 (Marzo 2021)
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