Ahel, Marijan; Giger, Walter; Molnar, Eva; Ibrić, Slavica
Determination of nonylphenol polyethoxylates and their lipophilic metabolites in sewage effluents by normal-phase high-performance liquid chromatography and fluorescence detection.
Croatica Chemica Acta, 73
Analytical procedures using normal-phase high-performance liquid chromatography (HPLC) with fluorescence detection, suitable for the routine determination of alkylphenol polyethoxylate (APnEO) surfactants and their lipophilic metabolites in sewage effluents at sub-microgram per litre level, have been developed. The parent nonylphenol polyethoxylates (NPnEO), covering oligomer range of 1-18 ethoxy units per molecule, were extracted from water samples using solid-phase extraction on graphitised carbon black (GCB), while their lipophilic metabolites, including nonylphenol monoethoxylate (NP1EO), nonylphenol diethoxylate (NP2EO) and nonylphenol (NP), were extracted by liquid-liquid extraction into n-hexane. The extracts were analysed by normal-phase HPLC using amino-silica columns and fluorescence detection at 228/305 nm. This allowed reliable quantitative determination of individual oligomers down to 0.1 mu g/l. Analyses of sewage effluents collected in several sewage treatment plants of the Canton of Zurich, Switzerland, indicated that NPnEO occur at significant concentrations (96-430 mu g/l) despite the partial ban introduced in 1986. Oligomer distributions found in analysed sewage samples revealed that the major part of toxic lipophilic metabolites, including NP, still originate from detergent-derived NPnEO.
||nonylphenol polyethoxylates; nonionic surfactants; nonylphenol; normal-phase HPLC; sewage effluents; persistent organic-chemicals; capillary gas-chromatography; nonionic surfactants; linear alkylbenzenesulfonates; alkylphenol polyethoxylates; environmental-samples; aquatic environment; mass-spectrometry; ethoxylates; behavior
||NATURAL SCIENCES > Chemistry
||Division for Marine and Enviromental Research
|Project title||Project leader||Project code||Project type|
|Biogeokemija organskih spojeva u prirodnim vodama||Marijan Ahel||00981501||MZOS|
||22 Nov 2013 14:16
||28 Feb 2014 11:05
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