论文信息 - Potentiometric pH sensors based on electrodeposited polymers

Potentiometric pH sensors based on electrodeposited polymers

Five potentiometric pH sensors based on thin polymer films, obtained from electropolymerization of their respective monomers: 1,3-diaminopropane, diethylenetriamine, pyrrole, p-phenylenediamine and aniline, were compared. All these molecules have been chosen since they contain amino groups, which are sensitive to proton concentration changes. The resulting sensors consist in a polymer-coated smooth platinum wire protruded from glass sheath. Their potentiometric responses appeared linear in the range from pH 2 to 11. These electrodes present also a good reversibility and a good stability in time over a period of 1 month. The response mechanisms are also examined.

[1] A. Michalska,et al. On the nature of the potentiometric response of polypyrrole in acidic solutions , 1995 .

[2] V. Jovanović,et al. The behavior of polypyrrole doped with different anions as an ion-selective electrode , 1995 .

[3] G. Herlem,et al. Surface modification of platinum and gold electrodes by anodic oxidation of pure ethylenediamine , 1997 .

[4] Guillaume Herlem,et al. pH sensing at Pt electrode surfaces coated with linear polyethylenimine from anodic polymerization of ethylenediamine , 2001 .

[5] M. Greenblatt,et al. Molybdenum oxide bronzes as pH sensors , 1996 .

[6] Wouter Olthuis,et al. A method of reducing oxygen induced drift in iridium oxide pH sensors , 1998 .

[7] Ali Eftekhari,et al. pH sensor based on deposited film of lead oxide on aluminum substrate electrode , 2003 .

[8] A. Ivaska,et al. Anionic responses of electrochemically synthesized polypyrrole films. , 1992, Talanta.

[9] Li Qingwen,et al. Response of nanosized cobalt oxide electrodes as pH sensors , 2000 .

[10] W. Heineman,et al. Polymer film chemically modified electrode as a potentiometric sensor , 1980 .

[11] Michel de Labachelerie,et al. Miniaturized pH biosensors based on electrochemically modified electrodes with biocompatible polymers. , 2004, Biosensors & bioelectronics.