Journal
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
Volume 408, Issue 6, Pages 1615-1621Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-015-9269-y
Keywords
Parabens; Electromembrane extraction; Water samples; Polypropylene hollow fiber
Funding
- Direccion General de Investigacion y Gestion del Plan Nacional de I + D + I (Ministerio de Educacion y Ciencia, Spain) [CTM2012-38720-C03]
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To our knowledge, for the first time an electromembrane extraction combined with a high-performance liquid chromatography procedure using diode-array detection has been developed for the determination of five of the most widely used parabens: ethyl 4-hydroxybenzoate, propyl 4-hydroxybenzoate, butyl 4-hydroxybenzoate, isobutyl 4-hydroxybenzoate, and benzyl 4-hydroxybenzoate. Parabens were extracted from pH 4 aqueous sample solutions with use of an AccurelA (R) S6/2 polypropylene hollow fiber that supports a liquid membrane of 1-octanol to a pH 12 aqueous acceptor solution placed inside the lumen of the hollow fiber. An electric current of 30 V was applied over the supported liquid membrane by means of platinum wires placed in the donor and acceptor phases. Parabens were extracted in 40 min with enrichment factors in the 30-49 range. The procedure has detection limits between 0.98 and 1.43 mu g L-1. The method was applied to the determination of parabens in surface environmental waters with excellent results.
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