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| Hauptseite > Publikationsdatenbank > Simplified determination of lipophilic metabolites of nonylphenol ethoxylates: method development and application in aqueous samples from Buenos Aires, Argentina |
| Hauptseite > Publikationsdatenbank > Simplified determination of lipophilic metabolites of nonylphenol ethoxylates: method development and application in aqueous samples from Buenos Aires, Argentina |
| Journal Article | PreJuSER-61335 |
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2008
Royal Society of Chemistry
London
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Please use a persistent id in citations: doi:10.1039/b717942a
Abstract: In the present work we have developed an analytical methodology for the determination of nonylphenol (NP) and nonylphenol mono- and di-ethoxylates (NP1EO and NP2EO) in water samples. The applicability of this methodology was proved by means of the analysis of environmentally relevant aqueous samples from Buenos Aires. This constitutes a starting point for a rigorous assessment of the incidence of NPnEO surfactants in Argentina, as only very few, qualitative or semi-quantitative data on the occurrence of these compounds in local systems were available up to this time. Enrichment of the analytes was carried out by solid-phase extraction on a C-18 sorbent, followed by elution with ethyl acetate. Normal-phase high performance liquid chromatography on an amino-silica column and fluorescence detection at excitation-emission wavelengths of 230-300 nm were employed for separation and quantification of the analytes. Confirmation of peak assignment in selected real samples was performed by off-line coupling HPLC with GC-MS analysis. A non-polar GC capillary column was used, and a characteristic peak pattern was obtained for the alkyl chain isomers of each ethoxylated homologue and NP. GC-MS analyses yielded in all cases purity levels higher than 80% for the HPLC collected fractions. The elevated concentrations found for the estrogenic metabolites of NPnEO are in accordance with an unrestricted use of this class of non-ionic surfactants in the country.
Keyword(s): Argentina (MeSH) ; Chromatography, High Pressure Liquid (MeSH) ; Environmental Monitoring: methods (MeSH) ; Ethylene Glycols: analysis (MeSH) ; Gas Chromatography-Mass Spectrometry (MeSH) ; Solid Phase Extraction (MeSH) ; Surface-Active Agents: analysis (MeSH) ; Water Pollutants, Chemical: analysis (MeSH) ; Ethylene Glycols ; Surface-Active Agents ; Water Pollutants, Chemical ; terics ; J
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