Evaluation of liquid-liquid microextraction using polypropylene microporous membranes for the determination of organophosphorus flame retardants and plasticizers in water samples

Analytica Chimica Acta
M García-LópezR Cela

Abstract

In this work, the suitability of the microporous membrane liquid-liquid extraction (MMLLE) technique for the concentration of several organophosphate esters (OPs) in water samples is assessed. Analytes were first extracted into a few microlitres of an organic solvent, immobilized in the pores of a hollow polypropylene membrane, and then determined by gas chromatography with nitrogen-phosphorus detection (GC-NPD). Main parameters controlling the efficiency of the extraction step were identified and their effects on the performance of the technique discussed. Under final working conditions, 2 cm long polypropylene membranes, containing about 7 microL of octanol in the pores, were dipped in a glass vial filled with 115 mL of water with a 30% of sodium chloride. Extractions were carried out for 12h, at room temperature, under magnetic stirring. After that, analytes were recovered from the membrane with 0.2 mL of ethyl acetate. This extract was mixed with the internal standard (50 microL of a tripentyl phosphate solution in the same solvent) and finally reduced to ca. 50 microL. Overall enrichment factors for the optimized method ranged from 35 to 1400 times, and the achieved limits of quantification from 0.008 to 0.12 ng mL(-1), de...Continue Reading

References

Sep 1, 2004·The Science of the Total Environment·J A AndresenK Bester
Apr 1, 2006·Journal of Chromatography. a·Mohammad RezaeeSana Berijani
Sep 22, 2007·The Science of the Total Environment·Elena Martínez-CarballoOliver Gans
Sep 25, 2007·Journal of Chromatography. a·Stig Pedersen-Bjergaard, Knut Einar Rasmussen

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Citations

Oct 22, 2008·Analytical and Bioanalytical Chemistry·C NerínR Batlle
Jan 16, 2014·Environmental Science and Pollution Research International·Laura Blanco-ZubiaguirreNestor Etxebarria
Oct 21, 2015·Journal of Chromatography. a·George S WeedenNien-Hwa Linda Wang
Oct 21, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Long PangHongzhong Zhang

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