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- W2024776898 abstract "The acid-induced liquid-liquid phase separation of anionic surfactants in aqueous solutions and its applicability to cloud point extraction methodology were applied as a tool for the extraction of 1,4-dichlorobenzene (p-DCB) from aqueous samples. p-DCB is extracted into the micelles of sodium dodecane sulfonate (SDSA) in a 4.2 M HCl solution. The micellar phase is separated from the bulk aqueous solution after centrifugation and collected from the surface of the suspension. The micellar extracts are injected into a high-performance liquid chromatographic apparatus and quantified at 225 nm with a reference wavelength of 280 nm. Following the proposed methodology, a preconcentration factor of ca. 160 is achieved (starting from 50 mL solutions) allowing for detection limits at the low microg/L level. Application to honey samples produced detection limits of 2.5 microg/kg with quantification limits of 7.5 microg/kg, while the recoveries of the method ranged from 85% at high concentrations to 95% at lower concentrations of p-DCB. The combined uncertainty of the entire analytical procedure was 4.5% at the concentration level of 30 microg/kg allowing for reliable and reproducible results for the determination of p-DCB at the concentration levels considered as thresholds for EU and U.S. legislation (10 microg/kg)." @default.
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- W2024776898 date "2006-06-22" @default.
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- W2024776898 title "Acid-Induced Phase Separation of Anionic Surfactants for the Extraction of 1,4-Dichlorobenzene from Honey Prior to Liquid Chromatography" @default.
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- W2024776898 doi "https://doi.org/10.1021/jf060273z" @default.
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