Vortex-assisted micro-solid-phase extraction followed by low-density solvent based dispersive liquid-liquid microextraction for the fast and efficient determination of phthalate esters in river water samples.
作者： Liang Guo , Hian Kee Lee
DOI: 10.1016/J.CHROMA.2013.01.030
关键词: Detection limit 、 Chemistry 、 Sorbent 、 Acetonitrile 、 Analytical chemistry 、 Extraction (chemistry) 、 Chromatography 、 Phthalate 、 Mass spectrometry 、 Solid phase extraction 、 Solvent
摘要: Abstract A simple and efficient two-step method, vortex-assisted micro-solid-phase extraction (VA-μ-SPE) followed by low-density solvent based dispersive liquid–liquid microextraction (LDS-DLLME) combined with analysis gas chromatography–mass spectrometry (GC–MS), was developed for the determination of trace level phthalate esters in environmental water samples. The analytes were firstly extracted preconcentrated μ-SPE which faster than conventional (6 min compared to 30 min), then desorbed ultrasonication into acetonitrile. latter served as subsequent LDS-DLLME step further pre-concentrated analytes. Six selected model compounds developing evaluating method. Some key parameters VA-μ-SPE LDS-DLLME, such sorbent selection amount, vortex time, type volume DLLME, speed time centrifugation, investigated. Under most favorable conditions, good limits detection (as low 0.006 μg/L) repeatability (RSDs below 9.2%, n = 5) obtained. method applied determine
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