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A metal organic framework-polyaniline nanocomposite as a fiber coating for solid phase microextraction

Bagheri, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.chroma.2015.12.077
  3. Publisher: Elsevier B. V
  4. Abstract:
  5. A metal organic framework-polyaniline (MOF/PANI) nanocomposite was electrodeposited on a stainless steel wire and used as a solid phase microextraction (SPME) fiber coating. The electropolymerization process was carried out under a constant deposition potential and applied to the corresponding aqueous electrolyte containing aniline and MOF particles. The employment of MOFs with their large and small cages and 3-D structures in synthesizing a nanocomposite was assumed to be efficient constitutes to induce more non-smooth and porous structures, approved by scanning electron microscopy (SEM) images. Three different MOFs were incorporated to synthesize the desired nanocomposites and the preliminary experiments showed that all of them, particularly the one containing MOF2, have higher extraction performances in compared with PANI. The applicability of the new fiber coating was examined by headspace-solid phase microextraction (HS-SPME) of some chlorobenzenes (CBs) from aqueous samples. Influencing parameters on the synthesize and extraction processes including the electrodeposition voltage and its duration time, the weight ratio of PANI and MOF, the ionic strength, desorption temperature and time, and extraction time and temperature were optimized. The developed method was validated by analyzing the spiked distilled water and gas chromatography-mass spectrometry (GC-MS). Under optimum condition, the relative standard deviation (RSD%) values for a double distilled water spiked with the selected CBs at 20ngL-1 were 5-8% (n=3) and the detection limits were below 0.2ngL-1. The linear dynamic range (LDR) of the method was in the concentration range of 0.5-1000ngL-1 (R2>0.9994). The fiber-to-fiber reproducibility was found to be in the range of 4-7%. Eventually, various real-water samples were analyzed by the MOF/PANI-based HS-SPME and GC-MS and the relative recovery values were found to be in the range of 92-98%
  6. Keywords:
  7. Coatings ; Crystalline materials ; Drug products ; Electric circuit breakers ; Electrodeposition ; Electrodes ; Electrolytes ; Fibers ; Gas chromatography ; Hydraulic structures ; Java programming language ; Mass spectrometry ; Organometallics ; Polyaniline ; Scanning electron microscopy ; Stainless steel ; Steel fibers ; Fiber coatings ; Gas chromatography-mass spectrometries (GC-MS) ; Head-space solid-phase microextraction ; Polyaniline nanocomposites ; Relative standard deviations ; Scanning electron microscopy image ; Solid-phase microextraction fibers ; Extraction ; Aniline ; Chlorobenzene ; Distilled water ; Metal organic framework polyaniline nanocomposite ; Nanocomposite ; Unclassified drug ; Aniline derivative ; Aqueous solution ; Article ; Chemical parameters ; Chemical structure ; Concentration (parameters) ; Controlled study ; Desorption ; Electropolymerization ; Limit of detection ; Mass fragmentography ; Material coating ; Molecular weight ; Particle size ; Polymerization ; Porosity ; Priority journal ; Reaction optimization ; Reproducibility ; Analysis ; Chemical analysis ; Chemistry ; Osmolarity ; Procedures ; Solid phase microextraction ; Temperature ; Ultrastructure ; Water pollutant ; Chemistry Techniques, Analytical ; Osmolar Concentration ; Reproducibility of Results ; Water Pollutants, Chemical
  8. Source: Journal of Chromatography A ; Volume 1431 , 2016 , Pages 27-35 ; 00219673 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0021967315018750