tWe present for the first time the application of metal-organic framework (MOF) mixed-matrix disks(MMD) for the automated flow-through solid-phase extraction (SPE) of environmental pollutants. Zirco-nium terephthalate UiO-66 and UiO-66-NH2MOFs with different size (90, 200 and 300 nm) have beenincorporated into mechanically stable polyvinylidene difluoride (PVDF) disks. The performance of theMOF-MMDs for automated SPE of seven substituted phenols prior to HPLC analysis has been evaluatedusing the sequential injection analysis technique. MOF-MMDs enabled the simultaneous extraction ofphenols with the concomitant size exclusion of molecules of larger size. The best extraction performancewas obtained using a MOF-MMD containing 90 nm UiO-66-NH2crystals. Using the selected MOF-MMD,detection limits ranging from 0.1 to 0.2 g L−1were obtained. Relative standard deviations ranged from3.9 to 5.3% intra-day, and 4.7–5.7% inter-day. Membrane batch-to-batch reproducibility was from 5.2 to6.4%. Three different groundwater samples were analyzed with the proposed method using MOF-MMDs,obtaining recoveries ranging from 90 to 98% for all tested analytes.
Metal-organic framework mixed-matrix disks: Versatile supports for automated solid-phase extraction prior to chromatographic separation
BERLIER, Gloria;
2017-01-01
Abstract
tWe present for the first time the application of metal-organic framework (MOF) mixed-matrix disks(MMD) for the automated flow-through solid-phase extraction (SPE) of environmental pollutants. Zirco-nium terephthalate UiO-66 and UiO-66-NH2MOFs with different size (90, 200 and 300 nm) have beenincorporated into mechanically stable polyvinylidene difluoride (PVDF) disks. The performance of theMOF-MMDs for automated SPE of seven substituted phenols prior to HPLC analysis has been evaluatedusing the sequential injection analysis technique. MOF-MMDs enabled the simultaneous extraction ofphenols with the concomitant size exclusion of molecules of larger size. The best extraction performancewas obtained using a MOF-MMD containing 90 nm UiO-66-NH2crystals. Using the selected MOF-MMD,detection limits ranging from 0.1 to 0.2 g L−1were obtained. Relative standard deviations ranged from3.9 to 5.3% intra-day, and 4.7–5.7% inter-day. Membrane batch-to-batch reproducibility was from 5.2 to6.4%. Three different groundwater samples were analyzed with the proposed method using MOF-MMDs,obtaining recoveries ranging from 90 to 98% for all tested analytes.File | Dimensione | Formato | |
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Turnes J Chrom A.pdf
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Turnes J Chrom 17 OA.pdf
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