A novel hybrid mesostructured silica for the solid-phase extraction of estrogenic hormones from waters
Mesoporous silica functionalized with octadecyl groups (denoted as SBA-15-C18) was prepared and characterized. The adsorption capacity of the prepared SBA-15-C18 for a mixture of twelve endocrine disrupting compounds (synthetic and natural estrogenic hormones) in aqueous media was evaluated by off-l...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universidad Rey Juan Carlos |
| Repositorio: | BURJC-Digital. Repositorio Institucional de la Universidad Rey Juan Carlos |
| OAI Identifier: | oai:burjcdigital.urjc.es:10115/13120 |
| Acceso en línea: | http://hdl.handle.net/10115/13120 |
| Access Level: | acceso embargado |
| Palabra clave: | Materiales Química Solid-phase extraction Mesoporous silica estrogens Water Endocrine disrupting compounds 23 Química |
| Sumario: | Mesoporous silica functionalized with octadecyl groups (denoted as SBA-15-C18) was prepared and characterized. The adsorption capacity of the prepared SBA-15-C18 for a mixture of twelve endocrine disrupting compounds (synthetic and natural estrogenic hormones) in aqueous media was evaluated by off-line solid-phase extraction (SPE) and compared with a commercial phase for SPE (ExtraBondR C18). Analytes were determined by high performance liquid chromatography with UV-Vis detection. Under optimized conditions (100 mg of SBA-15-C18 sorbent; conditioning: 2 mL methanol and 2 mL Milli-Q water; loading: 150 mL water sample; washing: 5 mL Milli-Q water; elution: 2 mL methanol; flow rate 0.5 mL min-1) the preconcentration factor achieved was 103. The analytical characteristics of this methodology were evaluated, showing good precision, accuracy and linerarity, with method quantification limits (MQL) between 0.16 and 3-00 ¿g L-1. The SBA-15-C18 material enabled the extraction of the twelve estrogenic hormones in tap water (pH 6.6), mineral water (pH 5.0), ground water (pH 7.3), river water (pH 5.0) and effluent wastewater (pH 5.0) with recoveries between 71 and 112% at the lower level studied (MQL). |
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