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Optical fiber spectroelectrochemical device for detection of catechol at press-transferred single-walled carbon nanotubes electrodes

Garoz-Ruiz, Jesus ; Izquierdo, Daniel ; Colina, Alvaro ; Palmero, Susana ; Heras, Aranzazu

Analytical and bioanalytical chemistry, 2013-04, Vol.405 (11), p.3593-3602 [Revista revisada por pares]

Berlin/Heidelberg: Springer-Verlag

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Optical fiber spectroelectrochemical device for detection of catechol at press-transferred single-walled carbon nanotubes electrodes
Autor: Garoz-Ruiz, Jesus ; Izquierdo, Daniel ; Colina, Alvaro ; Palmero, Susana ; Heras, Aranzazu
Materias: Analytical Chemistry ; Analytical instruments ; Biochemistry ; Calibration ; Carbon ; Catechol ; Characterization and Evaluation of Materials ; Chemistry ; Chemistry and Materials Science ; Design and construction ; Electrodes ; Engineering design ; Equipment and supplies ; Experiments ; Fiber optics ; Food Science ; Laboratory Medicine ; Light ; Mathematical analysis ; Methods ; Monitoring/Environmental Analysis ; Optical fibers ; Optical properties ; Original Paper ; Oxidation ; Quantitative analysis ; Single wall carbon nanotubes ; Sorption ; Ultraviolet radiation ; Wavelengths
Es parte de: Analytical and bioanalytical chemistry, 2013-04, Vol.405 (11), p.3593-3602
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descripción: A new long-optical-pathway spectroelectrochemical cell for absorptometric measurements in the UV–Vis region was developed. This cell consists of two optical fibers brought face to face and fixed on the working electrode support. As a proof of concept, the spectroelectrochemical cell was applied to the determination of catechol using a press-transferred single-walled carbon nanotube film as the working electrode. Voltabsorptometry was demonstrated to be very helpful in understanding the mechanism of catechol oxidation. The experiments showed that the main oxidation product is o -benzoquinone, but other soluble side products are also observed. Multivariate calibration explains the selection of 390 nm as the best wavelength for the univariate absorptometric determination of catechol, avoiding the interference of oxidation side products. Catechol was quantified using both the electrochemical and the spectroscopic signal, demonstrating that this hybrid technique is an autovalidated analytical method. Dual detection of catechol was also carried out using amperometric spectroelectrochemistry. Finally, spectroelectrochemistry was used to quantify catechol in the presence of hydroquinone.
Editor: Berlin/Heidelberg: Springer-Verlag
Idioma: Inglés

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Optical fiber spectroelectrochemical device for detection of catechol at press-transferred single-walled carbon nanotubes electrodes

Garoz-Ruiz, Jesus ; Izquierdo, Daniel ; Colina, Alvaro ; Palmero, Susana ; Heras, Aranzazu

Berlin/Heidelberg: Springer-Verlag

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