NDLI: Chemically bonded carbon nanotubes on modified gold substrate as novel unbreakable solid phase microextraction fiber

Content Provider	Springer Nature Link
Author	Bagheri, Habib Ayazi, Zahra Sistani, Habiballah
Copyright Year	2011
Abstract	A new technique is introduced for preparation of an unbreakable fiber using gold wire as a substrate for solid phase microextraction (SPME). A gold wire is used as a solid support, onto which a first film is deposited that consists of a two-dimensional polymer obtained by hydrolysis of a self-assembled monolayer of 3-(trimethoxysilyl)-1-propanthiol. This first film is covered with a layer of 3-(triethoxysilyl)-propylamine. Next, a stationary phase of oxidized multi-walled carbon nanotubes was chemically bound to the surface. The synthetic strategy was verified by Fourier transform infrared spectroscopy and scanning electron microscopy. Thermal stability of new fiber was examined by thermogravimetric analysis. The applicability of the novel coating was verified by its employment as a SPME fiber for isolation of diazinon and fenthion, as model compounds. Parameters influencing the extraction process were optimized to result in limits of detection as low as 0.2 ng mL−1 for diazinon, and 0.3 ng mL−1 for fenthion using the time-scheduled selected ion monitoring mode. The method was successfully applied to real water, and the recoveries for spiked samples were 104% for diazinon and 97% for fenthion. Figure A gold wire is used as a SPME fiber substrate, onto which a first film is deposited consisting a polymer obtained by hydrolysis of a self-assembled monolayer of 3-(trimethoxysilyl)-1-propanthiol. This first film is covered with a layer of 3-(triethoxysilyl)-propylamine. Next, a stationary phase of COOH-MWCNTs was chemically bound to the surface.
Starting Page	295
Ending Page	301
Page Count	7
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	174
Issue Number	3-4
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2011-05-27
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbon nanotube Self assembled monolayers (SAMs) Unbreakable fiber Solid phase microextraction Gas chromatography-mass spectrometry Nanotechnology Microengineering Analytical Chemistry Characterization and Evaluation of Materials Nanochemistry
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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