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Preparation and characterization of open-tubular capillary column modified with graphene oxide nanosheets for the separation of small organic molecules.
- Source :
-
Journal of chromatography. A [J Chromatogr A] 2013 Apr 05; Vol. 1284, pp. 180-7. Date of Electronic Publication: 2013 Feb 04. - Publication Year :
- 2013
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Abstract
- A novel coated capillary was prepared by immobilizing graphene oxide (GO) on the fused-silica capillary (75 μm i.d.) which was derivatized by 3-aminopropyl-trimethoxysilane (APTMS). The bare capillary, APTMS modified capillary (NH2-capillary) and GO coated capillary (GO-capillary) were characterized by streaming potentials (SPs), fluorescence microscope and scanning electron microscope (SEM). The results indicated that the capillary was successfully modified with GO sheets via covalent bonding and electrostatic effect. Compared with bare capillary, greater separation efficiency was achieved by GO-capillary column as a result of the increasing interactions between the small organic molecules and the inner wall of the GO-capillary column originated from the π-π electrostatic stacking. For three consecutive runs, the intra-day relative standard deviations (RSDs) of migration time and peak areas were 0.6-4.3% and 2.8-9.3%, respectively. The inter-day relative standard deviations of migration time and peak areas were 0.2-8.3% and 4.5-9.6%. Additionally, one GO-capillary column could be used for more than 100 runs with no observable changes on the separation efficiency.<br /> (Copyright © 2013 Elsevier B.V. All rights reserved.)
- Subjects :
- Acetonitriles chemistry
Benzene Derivatives analysis
Benzene Derivatives chemistry
Ethanol chemistry
Magnetic Resonance Spectroscopy
Methanol chemistry
Reproducibility of Results
Static Electricity
Temperature
Urea chemistry
Benzene Derivatives isolation & purification
Capillary Electrochromatography instrumentation
Capillary Electrochromatography methods
Graphite chemistry
Nanostructures chemistry
Oxides chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1873-3778
- Volume :
- 1284
- Database :
- MEDLINE
- Journal :
- Journal of chromatography. A
- Publication Type :
- Academic Journal
- Accession number :
- 23466202
- Full Text :
- https://doi.org/10.1016/j.chroma.2013.01.105