Ghani, M and Pico, MFF and Salehinia, S and Cabello, CP and Maya, F and Berlier, G and Saraji, M and Cerda, V and Palomino, GT, Metal-organic framework mixed-matrix disks: versatile supports for automated solid-phase extraction prior to chromatographic separation, Journal of Chromatography A, 1488 pp. 1-9. ISSN 0021-9673 (2017) [Refereed Article]
© 2017 Elsevier B.V. All rights reserved.
We 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. Zirconium terephthalate UiO-66 and UiO-66-NH2 MOFs with different size (90, 200 and 300 nm) have been incorporated into mechanically stable polyvinylidene difluoride (PVDF) disks. The performance of the MOF-MMDs for automated SPE of seven substituted phenols prior to HPLC analysis has been evaluated using the sequential injection analysis technique. MOF-MMDs enabled the simultaneous extraction of phenols with the concomitant size exclusion of molecules of larger size. The best extraction performance was obtained using a MOF-MMD containing 90 nm UiO-66-NH2 crystals. Using the selected MOF-MMD, detection limits ranging from 0.1 to 0.2 μg L−1 were obtained. Relative standard deviations ranged from 3.9 to 5.3% intra-day, and 4.7–5.7% inter-day. Membrane batch-to-batch reproducibility was from 5.2 to 6.4%. Three different groundwater samples were analyzed with the proposed method using MOF-MMDs, obtaining recoveries ranging from 90 to 98% for all tested analytes.
|Item Type:||Refereed Article|
|Keywords:||membranes, chromatography, metal-organic frameworks, mixed-matrix disks, solid-phase extraction, sequential injection analysis, high performance liquid chromatography, phenols|
|Research Division:||Chemical Sciences|
|Research Group:||Analytical chemistry|
|Research Field:||Separation science|
|Objective Division:||Expanding Knowledge|
|Objective Group:||Expanding knowledge|
|Objective Field:||Expanding knowledge in the chemical sciences|
|UTAS Author:||Maya, F (Mr Fernando Maya Alejandro)|
|Web of Science® Times Cited:||40|
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