Ultrasensitive online SERS detection of structural isomers separated by capillary zone electrophoresis
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چکیده
منابع مشابه
Ultrasensitive online SERS detection of structural isomers separated by capillary zone electrophoresis.
A mixture of structural isomers was separated and identified at nanomolar concentrations (∼100,000 molecules) by incorporating capillary zone electrophoresis (CZE) with a sheath flow surface-enhanced Raman scattering (SERS) detector. Baseline resolution was obtained from three structural isomers of rhodamine using a planar silver SERS substrate, demonstrating the utility of this approach for tr...
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There is a need for low cost, sensitive and chemical specific detectors for routine characterization of biomolecules. In this study, we utilize sheath-flow surface-enhanced Raman scattering (SERS) to analyze a mixture of eight biologically-active peptides separated by capillary zone electrophoresis (CZE). Analysis of the SERS electropherogram resulting from online detection resolves the charact...
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A sheath-flow surface-enhanced Raman scattering (SERS) detector is demonstrated to provide chemical information enabling identification of the 20 proteinogenic L-amino acids separated by capillary zone electrophoresis (CZE). Amino acids were used to illustrate the chemical specificity of SERS detection from structurally related molecules. Analysis of the SERS electropherograms obtained from the...
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Capillary zone electrophoresis was employed for the determination of histamine using end-column amperometric detection with a carbon fiber microelectrode, at a constant potential. The optimum conditions of separation and detection were 10 mmol/L phosphate buffer, pH 5.6 for the buffer solution, 15 kV for the separation voltage, and 1.35 V (versus SCE) for the detection potential. The linear ran...
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(29) Pszenny, A. A. P.: Harvey, G. R.; Brown, C. J.; Lang, R. F.; Keene, W. (21) Hendbook of ChemistryandPhysics, 56th ed.; CRC Press: Cleveland, OH, 1975. (22) Van Wijk, R. J. Chromatogr. Sci. 1970, 8 , 418-420. (23) Bertsch, W.: Chang, R. C.; Zlatkis, A. J. Chromatogr. Sei. 1974. 72, 175-182. (24) Butler, L. D.; Burke, M. F. J. Chromatogr. Sci. 1976, 74, 117-122. (25) Lang, R. F. Anal. Chem. ...
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ژورنال
عنوان ژورنال: Chem. Commun.
سال: 2014
ISSN: 1359-7345,1364-548X
DOI: 10.1039/c3cc49030k