INVESTIGADORES
LUQUE Guillermina Leticia
artículos
Título:
Analytical applications of a carbon nanotubes composite modified with copper microparticles as detector in flow systems
Autor/es:
ALBERTO SÁNCHEZ ARRIBAS, ESPERANZA BERMEJO, MANUEL CHICHARRO, ANTONIO ZAPARDIEL,GUILLERMINA L. LUQUE, NANCY F. FERREYRA, GUSTAVO A. RIVAS
Revista:
ANALYTICA CHIMICA ACTA
Editorial:
ELSEVIER
Referencias:
Año: 2006 vol. 577 p. 183 - 189
ISSN:
0003-2670
Resumen:
In this work we report on the successful use of a composite prepared by dispersion of multi-wall carbon nanotubes (15 m length, 2050 nm
diameter) and copper microparticles within mineral oil as detector for amino acids quantification in flow injection analysis and capillary electrophoresis.
The resulting electrode displays a highly sensitive amperometric detection of amino acids, based on the copper dissolution facilitated
by the strong activity of amino acids as ligands of Cu(II). The sensor makes possible the detection of amino acids, electroactive or not, at very low
potentials (0.000 V) and physiological pH. A correlation between the sensitivity for the amino acids and the amount of copper within the composite
is observed, demonstrating the importance of the metal in the sensor response. The best analytical performance is obtained for the electrode containing
12.0% (w/w) copper. The excellent results obtained with the carbon nanotube paste electrodes containing copper (CNTPE-Cu) as detector
in flow systems makes them an interesting alternative for further analytical applications involving different bioanalytes.
diameter) and copper microparticles within mineral oil as detector for amino acids quantification in flow injection analysis and capillary electrophoresis.
The resulting electrode displays a highly sensitive amperometric detection of amino acids, based on the copper dissolution facilitated
by the strong activity of amino acids as ligands of Cu(II). The sensor makes possible the detection of amino acids, electroactive or not, at very low
potentials (0.000 V) and physiological pH. A correlation between the sensitivity for the amino acids and the amount of copper within the composite
is observed, demonstrating the importance of the metal in the sensor response. The best analytical performance is obtained for the electrode containing
12.0% (w/w) copper. The excellent results obtained with the carbon nanotube paste electrodes containing copper (CNTPE-Cu) as detector
in flow systems makes them an interesting alternative for further analytical applications involving different bioanalytes.
diameter) and copper microparticles within mineral oil as detector for amino acids quantification in flow injection analysis and capillary electrophoresis.
The resulting electrode displays a highly sensitive amperometric detection of amino acids, based on the copper dissolution facilitated
by the strong activity of amino acids as ligands of Cu(II). The sensor makes possible the detection of amino acids, electroactive or not, at very low
potentials (0.000 V) and physiological pH. A correlation between the sensitivity for the amino acids and the amount of copper within the composite
is observed, demonstrating the importance of the metal in the sensor response. The best analytical performance is obtained for the electrode containing
12.0% (w/w) copper. The excellent results obtained with the carbon nanotube paste electrodes containing copper (CNTPE-Cu) as detector
in flow systems makes them an interesting alternative for further analytical applications involving different bioanalytes.
m length, 2050 nm
diameter) and copper microparticles within mineral oil as detector for amino acids quantification in flow injection analysis and capillary electrophoresis.
The resulting electrode displays a highly sensitive amperometric detection of amino acids, based on the copper dissolution facilitated
by the strong activity of amino acids as ligands of Cu(II). The sensor makes possible the detection of amino acids, electroactive or not, at very low
potentials (0.000 V) and physiological pH. A correlation between the sensitivity for the amino acids and the amount of copper within the composite
is observed, demonstrating the importance of the metal in the sensor response. The best analytical performance is obtained for the electrode containing
12.0% (w/w) copper. The excellent results obtained with the carbon nanotube paste electrodes containing copper (CNTPE-Cu) as detector
in flow systems makes them an interesting alternative for further analytical applications involving different bioanalytes.