%0 Journal Article
%A Babay, P. A.
%A Ale, E. E. R.
%A Itria, R. F.
%A Becquart, E. T.
%A Thiele, B.
%A Batistoni, D. A.
%T Simplified determination of lipophilic metabolites of nonylphenol ethoxylates: method development and application in aqueous samples from Buenos Aires, Argentina
%J Journal of environmental monitoring
%V 10
%@ 1464-0325
%C London
%I Royal Society of Chemistry
%M PreJuSER-61335
%P 443 - 452
%D 2008
%Z Record converted from VDB: 12.11.2012
%X 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.
%K Argentina
%K Chromatography, High Pressure Liquid
%K Environmental Monitoring: methods
%K Ethylene Glycols: analysis
%K Gas Chromatography-Mass Spectrometry
%K Solid Phase Extraction
%K Surface-Active Agents: analysis
%K Water Pollutants, Chemical: analysis
%K Ethylene Glycols (NLM Chemicals)
%K Surface-Active Agents (NLM Chemicals)
%K Water Pollutants, Chemical (NLM Chemicals)
%K terics (NLM Chemicals)
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:18385865
%U <Go to ISI:>//WOS:000254648300007
%R 10.1039/b717942a
%U https://juser.fz-juelich.de/record/61335