title: Synthesis of a metal-organic framework confined in periodic mesoporous silica with enhanced hydrostability as a novel fiber coating for solid-phase microextraction.
abstract: A metal-organic framework/periodic mesoporous silica (MOF-5@SBA-15) hybrid material has been prepared by using SBA-15 as a matrix. The prepared MOF-5@SBA-15 hybrid material was then deposited on a stainless-steel wire to obtain the fiber for the solid-phase microextraction of phenolic compounds. Modifications in the metal-organic framework structure have proven to improve the extraction performance of MOF/SBA-15 hybrid materials, compared to pure MOF-5 and SBA-15. Optimum conditions include an extraction temperature of 75°C, a desorption temperature of 260°C, and a salt concentration of 20% w/v. The dynamic linear range and limit of detection range from 0.1-500 and from 0.01-3.12 ng/mL, respectively. The repeatability for one fiber (n = 3), expressed as relative standard deviation, is between 4.3 and 9.6%. The method offers the advantage of being simple to use, rapid, and low cost, the thermal stability of the fiber, and high relative recovery (compared to conventional methods) represent additional attractive features.
authors: Department of Chemistry, Faculty of Science, University of Maragheh, Maragheh, Iran.
authors: Mir Mahdi
authors: MM
authors: Abolghasemi
authors: Vahid
authors: V
authors: Yousefi
authors: Marzieh
authors: M
authors: Piryaei
mesh_terms: D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D008670:Metals / Q000737:chemistry*; D009930:Organic Chemicals / Q000737:chemistry*; D009994:Osmolar Concentration; D015203:Reproducibility of Results; D012822:Silicon Dioxide / Q000737:chemistry*; D052617:Solid Phase Microextraction / Q000379:methods*; D013696:Temperature
chemical_list: D008670:Metals; D009930:Organic Chemicals; D012822:Silicon Dioxide
keywords: Gas chromatography with mass spectrometry; Metal-organic frameworks; Periodic mesoporous silica; Phenolic compounds; Solid-phase microextraction