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

Journal Article

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Journal of separation science

J.Sep.Sci.

Nov

3246

3252

CI: Copyright (c) 2011; JID: 101088554; 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Polymers); 0 (Water Pollutants, Chemical); 60650-90-0 (Silica Gel); 7440-57-5 (Gold); 2011/04/22 [received]; 2011/08/13 [revised]; 2011/08/15 [accepted]; 2011/10/26 [aheadof

Germany

1615-9314; 1615-9306

PMID: 22028302

eng

Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't; IM

10.1002/jssc.201100367 [doi]

Unknown(0)

22028302

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 degrees 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%.

Adsorption, Gold/chemistry, Polycyclic Hydrocarbons, Aromatic/analysis/isolation & purification, Polymers/chemistry, Porosity, Silica Gel/chemistry, Solid Phase Microextraction/instrumentation/methods, Water Pollutants, Chemical/analysis/isolation & purification

WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Bagheri,H., Sistani,H., Ayazi,Z.

Environmental and Bio-Analytical Laboratories, Department of Chemistry, Sharif University of Technology, Tehran, Iran. bagheri@sharif.edu

20111026

http://vp9py7xf3h.search.serialssolutions.com/?charset=utf-8&pmid=22028302

2011