Effect of ionic strength on the behavior of amperometric enzyme electrodes mediated by redox hydrogels
The electron-transfer behavior of electroactive hydrogels formed by cross-linking ferrocene pofy(allylamine) (Fc-PAA) and glucose oxidase is investigated as a function of electrolyte ionic strength using several techniques. Cyclic voltammetry and electrochemical impedance spectroscopy show that the...
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| Otros Autores: | , , |
| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
American Chemical Society
1999
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
| LEADER | 03412caa a22004697a 4500 | ||
|---|---|---|---|
| 001 | PAPER-19638 | ||
| 003 | AR-BaUEN | ||
| 005 | 20241007100358.0 | ||
| 008 | 190411s1999 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0033104279 | |
| 024 | 7 | |2 cas |a glucose oxidase, 9001-37-0 | |
| 030 | |a ANCHA | ||
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Battaglini, Fernando | |
| 245 | 1 | 0 | |a Effect of ionic strength on the behavior of amperometric enzyme electrodes mediated by redox hydrogels |
| 260 | |b American Chemical Society |c 1999 | ||
| 270 | 1 | 0 | |m Battaglini, F.; INQUIMAE, Departmento Quimica Inorganica, Analitica y Quimica Fisica, Universidad de Buenos Aires, AR-1428, Buenos Aires, Argentina |
| 504 | |a Heller, A., (1990) Acc. Chem. Res., 23, p. 128 | ||
| 504 | |a Csoregi, E., Schmidthe, D.W., Heller, A., (1995) Anal. Chem., 67, p. 1240 | ||
| 504 | |a Calvo, E.J., Damilowicz, C., Diaz, L., (1994) J. Electroanal. Chem., 369, p. 279 | ||
| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a The electron-transfer behavior of electroactive hydrogels formed by cross-linking ferrocene pofy(allylamine) (Fc-PAA) and glucose oxidase is investigated as a function of electrolyte ionic strength using several techniques. Cyclic voltammetry and electrochemical impedance spectroscopy show that the quantity cDe 1/2 increases with electrolyte concentration. Enhancement of enzyme catalysis for the oxidation of glucose mediated by Fc-PAA is also apparent at higher KNO3 concentration. The electroactive redox center concentration, c, and the diffusion coefficient due to electron hopping in the gel, De, are independently measured by chronoamperometry at ultramicroelectrodes. Larger electrolyte ionic strength induces an increase in electroactive redox center concentration while De slightly decreases. These results are rationalized in terms of the electrostatic interactions within the redox gel backbone due to water and ion exchange with the external electrolyte, producing swelling and shrinking of the hydrogel. © 1999 American Chemical Society. |l eng | |
| 593 | |a INQUIMAE, Departmento Quimica Inorganica, Analitica y Quimica Fisica, Universidad de Buenos Aires, AR-1428, Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a FERROCENE DERIVATIVE |
| 690 | 1 | 0 | |a GLUCOSE OXIDASE |
| 690 | 1 | 0 | |a AMPEROMETRY |
| 690 | 1 | 0 | |a ARTICLE |
| 690 | 1 | 0 | |a ENZYME ELECTRODE |
| 690 | 1 | 0 | |a HYDROGEL |
| 690 | 1 | 0 | |a IONIC STRENGTH |
| 690 | 1 | 0 | |a OXIDATION REDUCTION REACTION |
| 700 | 1 | |a Calvo, E.J. | |
| 700 | 1 | |a Danilowicz, C. | |
| 700 | 1 | |a Wolosiuk, A. | |
| 773 | 0 | |d American Chemical Society, 1999 |g v. 71 |h pp. 1062-1067 |k n. 5 |p Anal. Chem. |x 00032700 |w (AR-BaUEN)CENRE-146 |t Analytical Chemistry | |
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| 856 | 4 | 0 | |u https://doi.org/10.1021/ac971253m |x doi |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_00032700_v71_n5_p1062_Battaglini |x handle |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00032700_v71_n5_p1062_Battaglini |x registro |y Registro en la Biblioteca Digital |
| 961 | |a paper_00032700_v71_n5_p1062_Battaglini |b paper |c PE | ||
| 962 | |a info:eu-repo/semantics/article |a info:ar-repo/semantics/artículo |b info:eu-repo/semantics/publishedVersion | ||
| 963 | |a VARI | ||