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Title: Microwave-assisted extraction combined with on-line solid phase extraction followed by ultra-high-performance liquid chromatography with tandem mass spectrometric determination of benzotriazole UV stabilizers in marine sediments and sewage sludges
Authors: Montesdeoca-Esponda, Sarah 
Sosa-Ferrera, Zoraida 
Santana-Rodríguez, José Juan 
UNESCO Clasification: 2301 química analítica
Keywords: Benzotriazole
Microwave-assisted extraction
Solid phaseextraction
Ultra-violet stabilizers
Issue Date: 2013
Publisher: 1615-9306
Project: Desarrollo de Nuevas Estrategias de Extracción en El Análisis de Residuos Farmacéuticos.Implementación en Muestras Reales de Interés Medioambiental. 
Journal: Journal of Separation Science 
Abstract: Benzotriazole ultra‐violet stabilisers are compounds widely used in personal care products, which can reach the environment after passing through wastewater treatment plants. In this work, we develop a novel method to evaluate the presence of seven compounds in marine sediments and sewage sludges using microwave‐assisted extraction followed by a clean‐up step based in on‐line solid phase extraction coupled to ultra‐high‐performance liquid chromatography with MS/MS detection. This method allows for fast and efficient extraction from the solid matrix, subsequent automatic on‐line purification and preconcentration, and analysis. For the optimised method, LOD were from 53.3 to 146 ng/kg and LOQ were in the range of 176–486 ng/kg. The method was validated for different environmental solid samples with satisfactory recoveries and relative standard deviations, between 46.1 and 83.9 and 7.8 and 15.5% (sludges) and 50.1 and 87.1% and 8.83 and 16.3% (sediments), respectively. Finally, the studied analytes were quantified in concentrations between 0.18 and 24.0 ng/g in real samples of marine sediments and sewage sludges from Gran Canaria Island (Spain).
ISSN: 1615-9306
DOI: 10.1002/jssc.201200664
Source: Journal Of Separation Science [ISSN 1615-9306], v. 36 (4), p. 781-788
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