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The geometrical characteristics of nickel-based metal organic framework on its entrapment capability

Javanmardi, H ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.chroma.2019.460551
  3. Publisher: Elsevier B.V , 2020
  4. Abstract:
  5. Here, a three dimensional nickel–based metal organic framework (MOF) was synthesized via solvothermal and room temperature protocols. In order to study the effects of the synthesis conditions on the physical properties such as pore sizes and shapes of the prepared MOFs, their extraction capabilities were examined. Both MOFs were characterized by Fourier transform infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, Brunauer–Emmett–Teller and thermogravimetric analyses. Brilliant properties such as porous structure, high surface area and considerable thermal stability make them reasonable candidates to be employed as efficient extractive phases. The efficiency of the superior nickel–based MOF was evaluated for headspace needle trap extraction of chlorobenzenes as model compounds in conjunction with gas chromatography–mass spectrometry (GC–MS). The MOF-based extractive phase was conveniently packed in a needle trap device and after extraction, the desorption process was performed via direct insertion of needle into the GC inlet. After optimizing the extraction/desorption conditions, the figures of merit such as linear dynamic range was in the range of 5–1000 ng L−1 (R2 > 0.987) while the limits of detection and quantification values were 2–10 and 6–30 ng L−1, respectively. The intra- and inter-day relative standard deviations for three replicates at the concentration level of 50 ng L−1 were in the range of 7–9% and 9–12%, respectively. The needle-to-needle reproducibility was also found to be in the range of 5–11%. Acceptable relative recovery values at the concentration level of 50 ng L−1 ranged from 85 to 96%, showing no significant matrix effect. © 2019
  6. Keywords:
  7. Chlorobenzenes ; Geometrical effects ; Headspace needle trap extraction ; Surface water analysis ; Chemicals removal (water treatment) ; Crystalline materials ; Fourier transform infrared spectroscopy ; Gas chromatography ; Mass spectrometry ; Needles ; Nickel ; Organometallics ; Pore size ; Scanning electron microscopy ; Surface waters ; Thermogravimetric analysis ; Geometrical characteristics ; Geometrical effect ; Linear dynamic ranges ; Metal organic framework ; Needle traps ; Powder X ray diffraction ; Relative standard deviations ; Extraction ; Chlorobenzene ; Nanomaterial ; River water ; Tap water ; Desorption ; Extraction ; Extraction temperature ; Geometry ; Headspace extraction ; Limit of quantitation ; Mass fragmentography ; Physical parameters ; Priority journal ; Reproducibility ; Room temperature ; Surface area ; Synthesis ; Thermogravimetry ; Thermostability ; Water sampling ; X ray diffraction ; Chemical model ; Chemistry ; Devices ; Isolation and purification ; Statistical model ; Chlorobenzenes ; Gas Chromatography-Mass Spectrometry ; Limit of Detection ; Linear Models ; Materials Testing ; Metal-Organic Frameworks ; Models, Chemical ; Nickel ; Reproducibility of Results
  8. Source: Journal of Chromatography A ; Volume 1610 , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0021967319309458