Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Alfonso Berduque"'
Publikováno v:
Electrochimica Acta. 55:4234-4239
Geometrically regular silicon membrane-based micropore arrays were employed for defined arrays of micrometer-sized interfaces between two immiscible electrolyte solutions (μITIES). These were incorporated into a poly(tetrafluoroethylene) (PTFE) hydr
Electrochemically Modulated Liquid−Liquid Extraction of Ionized Drugs under Physiological Conditions
Publikováno v:
Analytical Chemistry. 80:8102-8108
Electrochemically modulated liquid-liquid extraction (EMLLE) enables the selective extraction and separation of ions from mixtures by choice of an applied interfacial potential difference. The extraction of ionized drugs from artificial urine is repo
Autor:
Courtney J. Collins, Alexandra Homsy, Alfonso Berduque, Jörg Strutwolf, Damien W. M. Arrigan, Grégoire Herzog
Publikováno v:
Microfluidics and Nanofluidics. 6:231-240
A microfluidic device is presented with off-chip electrodes residing in a reservoir and connected via micro-capillaries to the Y-shaped microfluidic channel. The device is tested by potentiometric measurements involving dual-stream laminar flow of tw
Publikováno v:
Analytica Chimica Acta. 611:156-162
The detection of protonated dopamine by differential pulse voltammetry (DPV) and square wave voltammetry (SWV) at arrays of micro-interfaces between two immiscible electrolyte solutions (microITIES) is presented. Microfabricated porous silicon membra
Autor:
John Alderman, Yvonne E. Watson, Kenneth Rodgers, Damien W. M. Arrigan, Grégoire Herzog, Alfonso Berduque, Valerio Beni, Yvonne H. Lanyon, Frank Stam
Publikováno v:
Talanta. 71:1022-1030
This paper describes the electrochemical characterisation of a range of gold and platinum microelectrode arrays (MEAs) fabricated by standard photolithographic methods. The inter-electrode spacing, geometry, numbers and dimensions of the electrodes i
Autor:
Alfonso Berduque, Damien W. M. Arrigan
Publikováno v:
Analytical Chemistry. 78:2717-2725
Electrochemistry at the interface between two immiscible electrolyte solutions has been presented as a method of electrochemically modulated liquid-liquid extraction, where ions in a mixture can be selectively partitioned as a function of the applied
Autor:
Andrea Bencini, Enrico Faggi, Micheál D. Scanlon, Aoife M. O'Mahony, Damien W. M. Arrigan, Alfonso Berduque, Valerio Beni
Publikováno v:
Electrochemistry Communications, Vol 7, Iss 10, Pp 976-982 (2005)
The voltammetry of hexavalent chromium (ammonium dichromate) at the interface between two immiscible electrolyte solutions is reported. Detection of Cr(VI) by ion transfer voltammetry is possible by use of an organic phase ionophore, which facilitate
Publikováno v:
Analytical Chemistry. 77:7310-7318
The development of ion extraction methods under electrochemical control via electrochemistry at the interface between two immiscible electrolyte solutions is discussed. A hydrodynamic flow injection system was used for the potentiostatic extraction o
Autor:
Yvonne E. Watson, Guy Royal, Damien W. M. Arrigan, Olivier Reynes, Grégoire Herzog, Eric Saint-Aman, Jean-Claude Moutet, Alfonso Berduque
Publikováno v:
Electroanalysis. 17:392-399
Platinum and gold microelectrode arrays (MEAs), fabricated on silicon substrates with different geometric characteristics, were surface-modified by the potentiostatic electropolymerization of the pyrrole-ferrocene derivative Py(CH2)3NHCOFc, in the ca
Publikováno v:
Journal of agricultural and food chemistry. 56(12)
Electrochemistry at the liquid-liquid interface enables the detection of nonredoxactive species with electroanalytical techniques. In this work, the electrochemical behavior of two food additives, aspartame and acesulfame K, was investigated. Both io