Solid-phase extraction and field-amplified sample injection–capillary zone electrophoresis for the analysis of benzophenone UV filters in environmental water samples
| Autor: | Oscar Núñez, Jessica Legaz, Roser Cinca, Miquel Purrà |
|---|---|
| Přispěvatelé: | Universitat de Barcelona |
| Rok vydání: | 2014 |
| Předmět: |
Detection limit
Sorbent Chromatography Solid Phase Extraction Extraction (chemistry) Analytical chemistry Electrophoresis Capillary Water analysis Biochemistry Analytical Chemistry Capillary electrophoresis Matrix (chemical analysis) Benzophenones chemistry.chemical_compound Electrophoresis Rivers chemistry Electroforesi capil·lar Benzophenone Solid phase extraction Anàlisi de l'aigua Water Pollutants Chemical |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Dipòsit Digital de la UB Universidad de Barcelona |
| ISSN: | 1618-2650 1618-2642 |
| DOI: | 10.1007/s00216-014-8086-z |
| Popis: | A field amplified sample injection-capillary zone electrophoresis (FASI-CZE) method for the analysis of benzophenone (BP) UV-filters in environmental water samples was developed, allowing the separation of all compounds in less than 8 minutes. A 9- to 25-fold sensitive enhancement was obtained with FASI-CZE, achieving limits of detection down to 21-59 µg/L for most of the analyzed BPs, with acceptable run-to-run and day-to-day precisions (relative standard deviations lower than 17%). In order to remove water sample salinity and to enhance FASI sensitivity, an off-line solid-phase extraction (SPE) procedure using a Strata X polymeric reversed-phase sorbent was proposed, obtaining recoveries up to 72-90% for most of benzophenones. With the combination of off-line SPE and FASI-CZE, limits of detection in the range 0.06-0.6 µg/L in a river water matrix, representing a 2400- to 6500-fold enhancement, were obtained. Method performance was evaluated by quantifying a blank river water sample spiked at 1 µg/L. For a 95% confidence level, no statistical differences were observed between found concentrations and spiked concentrations (probability at the confidence level, p value, of 0.60), showing that the proposed off-line SPE-FASI-CZE method is suitable for the analysis of benzophenone UV-filters in environmental water samples at low µg/L levels. The method was successfully applied to the analysis of BPs in river water samples collected before and after industrialized and urban areas, and in some drinking water samples. |
| Databáze: | OpenAIRE |
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