Simultaneous determination of multiresidue and multiclass emerging contaminants in waters by rotating-disk sorptive extraction–derivatization-gas chromatography/mass spectrometry
Author
dc.contributor.author
Arismendi, Daniel
Author
dc.contributor.author
Becerra Herrera, Mercedes
Author
dc.contributor.author
Cerrato, Inmaculada
Author
dc.contributor.author
Richter Duk, Pablo
Admission date
dc.date.accessioned
2019-10-30T15:18:50Z
Available date
dc.date.available
2019-10-30T15:18:50Z
Publication date
dc.date.issued
2019
Cita de ítem
dc.identifier.citation
Talanta, Volumen 201,
Identifier
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00399140
Identifier
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10.1016/j.talanta.2019.03.120
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/172120
Abstract
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An efficient method has been developed for the multiresidue and multiclass determination of 16 emerging contaminants (parabens, hormones, anti-inflammatory drugs, triclosan and bisphenol A) in water samples using rotating-disk sorptive extraction (RDSE) and gas chromatography coupled to mass spectrometry (GC-MS). Silylation of the compounds prior to GC-MS analysis was optimized using a factorial experimental design; the optimal derivatization conditions to maximize the response of the set of analytes included 70 μL of N-methyl-N-(trimethylsilyl)trifluoroacetamide at 80 °C for 35 min. RDSE was implemented using Oasis® HLB as a sorptive phase and an extraction time of 60 min. The method was applied to Chilean environmental samples. In tap water, none of the analytes under study were detected. In the river and well waters, the concentrations of the four detected contaminants were below 0.38 μg L−1. In the effluent and influent of the wastewater treatment plant, the maximum concentrations of contaminants were 3.1 and 4.2 μg L−1, respectively. The proposed analytical strategy suggests clear improvements with respect to other methods reported in the literature, considering not only the different steps involved in the analytical process (extraction, derivatization and chromatography) but also taking into account that this method involves the determination of different families of analytes with different physicochemical and structural properties.
Simultaneous determination of multiresidue and multiclass emerging contaminants in waters by rotating-disk sorptive extraction–derivatization-gas chromatography/mass spectrometry