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Novel unbreakable solid-phase microextraction fiber by electrodeposition of silica sol-gel on gold

Bagheri, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1002/jssc.201100367
  3. Abstract:
  4. A new technique for preparation of an unbreakable solid-phase microextraction (SPME) fiber, using sol-gel technology is developed. Primarily, an ultrathin two-dimensional intermediate film was prepared by hydrolysis of 3-(trimethoxysilyl)-1-propanthiol self-assembled monolayer grafted onto gold, then a stationary phase by electrodeposition of 3-(trimethoxysilyl) propylmethacrylate as a precursor, tetramethyl orthosilicate and polyethylene glycol as a coating polymer was produced. The scanning electron microscopy images revealed that the new fiber exhibits a rather porous and homogenous surface. The thermal stability of the fabricated fiber was investigated by thermogravimetric analysis. The applicability of the prepared fiber coating in conjunction with gas chromatography-mass spectrometry was examined by SPME of polycyclic aromatic hydrocarbons, as model analytes, from aquatic media. An extraction time of 20 min at 50°C gave maximum peak areas when NaCl, 15% was added to the aqueous samples. Limits of detection were in the range of 0.01-0.02 ng/mL and relative standard deviation values were in the range of 4-16% at 1 ng/mL. The developed method was successfully applied for the analysis of real water samples while the relative recovery percentage was in the range of 102-118%
  5. Keywords:
  6. Electrodeposition ; GC-MS ; Self-assembled monolayer ; Sol-gel ; Solid-phase microextraction ; Analytes ; Aquatic media ; Aqueous samples ; Coating polymers ; Extraction time ; Fabricated fibers ; Fiber coatings ; Gas chromatography-mass spectrometry ; Limits of detection ; Orthosilicate ; Peak area ; Relative standard deviations ; Scanning electron microscopy image ; Silica sol gels ; Sol-gel technology ; Stationary phase ; Tetramethyl ; Ultra-thin ; Water samples ; Coatings ; Fibers ; Gas chromatography ; Gels ; Glycols ; Gold coatings ; Hydrocarbons ; Mass spectrometry ; Polycyclic aromatic hydrocarbons ; Polyethylene glycols ; Scanning electron microscopy ; Self assembled monolayers ; Silica ; Sol-gel process ; Sol-gels ; Sols ; Thermodynamic stability ; Thermogravimetric analysis ; Extraction ; Ethylene glycol ; Polycyclic aromatic hydrocarbon ; Polymer ; Silicon dioxide ; Sodium chloride ; Aqueous solution ; Article ; Fiber ; Film ; Gel ; Hydrolysis ; Limit of detection ; Monolayer culture ; Priority journal ; Scanning electron microscope ; Sol gel ; Solid phase microextraction ; Thermogravimetry ; Thermostability ; Water sampling ; Adsorption ; Gold ; Polycyclic hydrocarbons, aromatic ; Polymers ; Porosity ; Silica gel ; Solid phase microextraction ; Water pollutants, chemical
  7. Source: Journal of Separation Science ; Volume 34, Issue 22 , 2011 , Pages 3246-3252 ; 16159306 (ISSN)
  8. URL: http://onlinelibrary.wiley.com/doi/10.1002/jssc.201100367/abstract;jsessionid=2F1A4933B4FD99AED95BBB0C94F82B11.f04t01?systemMessage=Subscribe+and+renew+is+currently+unavailable+online.+Please+contact+customer+care+to+place+an+order%3A++http%3A%2F%2Folabout.wiley.com%2FWileyCDA%2FSection%2Fid-397203.html++.Apologies+for+the+inconvenience