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Repositorio de la Universidad de Oviedo > Producción Bibliográfica de UniOvi: RECOPILA > Artículos >

Use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10651/44483

Título : Double-chained cationic surfactant modification of SU-8/Pyrex® microchips for electrochemical sensing of carboxylic ferrocene after reverse electrophoresis
Autor(es) y otros: Alonso Bartolomé, Rebeca
González López, Andrea
Fernández Abedul, María Teresa
Palabras clave: Ferrocene carboxylic acid
Microchip electrophoresis
Electrochemical detection
DDAB surfactant
Fecha de publicación : 2018
Versión del editor: http://dx.doi.org/10.1016/j.snb.2017.08.012
Citación : Sensors and Actuators B: Chemical, 255, p. 490–497 (2018); doi:10.1016/j.snb.2017.08.012
Descripción física: p. 490–497
Resumen : This paper describes the effect ofthe modification of microchip microchannels with two different cationic surfactants on the electrochemical behavior of ferrocene carboxylic acid (FCA), common redoxprobe in bioanalysis. Cetyltrimethylammonium bromide (CTAB), a single-chain surfactant, and didecyldimethylammonium bromide (DDAB), double-chained, were evaluated. The purpose was to obtain a reversal of the electroosmotic flow for allowing precise determination of FCA, an anionic probe that is employed in electrochemical bioassays. Although this was possible in both cases, modification of the microchannel with a high concentration of CTAB produced a differentiation between the free CTAB fraction and the CTAB-combined FCA. DDAB is presented as a good alternative for this modification because this doublechained cationic surfactant forms a more stable quasi-permanent coating on the microchannel surface, avoiding these surfactant-probe interactions. Linear relationship was found between the analytical signal and the concentration of FCA (evaluated between 10 and 150 M) for a modification with 0.1 mM of DDAB
Fecha fin embargo: 2019-08
URI : http://hdl.handle.net/10651/44483
ISSN : 0925-4005
Aparece en las colecciones: Química Física y Analítica
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