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- W2050206998 abstract "The capabilities of four commercially available and low cost polymeric materials for the extraction of polar and non-polar contaminants (log Kow = −0.07–6.88, from caffeine to octocrylene, respectively) from water samples was compared. Tested sorbents were polyethersulphone, polypropylene and Kevlar, compared to polydimethylsiloxane as reference material. Parameters that affect the extraction process such as pH and ionic strength of the sample, extraction time and desorption conditions were thoroughly investigated. A set of experimental partition coefficients (Kpw), at two different experimental conditions, was estimated for the best suited materials and compared with the theoretical octanol–water (Kow) partition coefficients of the analytes. Polyethersulphone displayed the largest extraction yields for both polar and non-polar analytes, with higher Kpw and lower matrix effects than polydimethylsiloxane and polypropylene. Thus, a sorptive microextraction method, followed by large volume injection (LVI) gas chromatography–tandem mass spectrometry (GC–MS/MS), was proposed using the former sorbent (2 mg) for the simultaneous determination of model compounds in water samples. Good linearity (>0.99) was obtained for most of the analytes, except in the case of 4-nonylphenol (0.9466). Precision (n = 4) at 50 and 500 ng L−1 levels was in the 2–24% and limits of detection (LODs) were in the 0.6–25 ng L−1 range for all the analytes studied." @default.
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- W2050206998 date "2012-02-01" @default.
- W2050206998 modified "2023-10-10" @default.
- W2050206998 title "Evaluation of low-cost disposable polymeric materials for sorptive extraction of organic pollutants in water samples" @default.
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- W2050206998 doi "https://doi.org/10.1016/j.aca.2011.12.023" @default.
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