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.
2017
1488
1
9
www.elsevier.com/locate/chroma
http://www.sciencedirect.com/science/article/pii/S0021967317301541
High performance liquid chromatography; Metal-organic frameworks; Mixed-matrix disks; Phenols; Sequential injection analysis; Solid-phase extraction; Automation; Chromatography, High Pressure Liquid; Groundwater; Limit of Detection; Metals; Microscopy, Electron, Scanning; Phenols; Polyvinyls; Reference Standards; Reproducibility of Results; Rhodamines; Solid Phase Extraction; Solvents; X-Ray Diffraction; Analytical Chemistry; Biochemistry; Organic Chemistry
Ghani, Milad; Font Picó, Maria Francesca; Salehinia, Shima; Palomino Cabello, Carlos; Maya, Fernando; Berlier, Gloria; Saraji, Mohammad; Cerdà, Víctor; Turnes Palomino, Gemma
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1637703
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