INVESTIGADORES
UREÑA Maria Andrea
artículos
Título:
Ion selective electrodes based on Chalcogenide Glasses
Autor/es:
CONDE GARRIDO, J. M.; MARIA ANDREA UREÑA; ARCONDO, B.
Revista:
JOURNAL OF ALLOYS AND COMPOUNDS
Editorial:
Elsevier Science
Referencias:
Lugar: Amsterdan; Año: 2010 vol. 495 p. 356 - 359
ISSN:
0925-8388
Resumen:
The
properties of chalcogenide glasses as sensitive membranes in ion selective
electrodes (ISE´s) have been investigated over the last three decades. They
have proven to be excellent materials for this application even in acidic
media. A remarkable glass forming ability either as bulk or as thin films
enables the use of these materials in the development of sensitive membranes
for micro-sensors or multi-sensor arrays accordant with microelectronic
technology. In the present work we found that ISE´s based on the AgGeSe system
show sensitivity to the presence of Ag+ and Cu2+ ions in aqueous solutions and
in both cases they exhibit super-nernstian responses. The analytical properties
such as reproducibility, linear range, sensitivity and detection limit were
studied. The response of the electrodes is apparently conditioned by the amount
of Ag in the membrane. The addition of Cu to the membrane composition does not
improve the sensitivity of the electrodes. The sensitivity to Cu2+ ions of thin
film ISE´s of composition (AgCu)GeSe was found to be smaller than the one of
bulk ISE´s, but still super-nernstian