Development of an amperometric sensor for potassium ions

Autor(es)

Teixeira, Marcos F. S. ; Lima, Alex S. ; Seraphim, Patnicia Monteiro ; Bocchi, Nerilso ; Bastos, T ; Gamboa, H

• Tipo de documento: Artigo Científico
• Fonte: BIODEVICES 2008: PROCEEDINGS OF THE FIRST INTERNATIONAL CONFERENCE ON BIOMEDICAL ELECTRONICS AND DEVICES, VOL 1; v. N/A, p. 2-pg., 2008-01-01.

Resumo

Hollandite-type manganese oxides are nanofibrous crystals with sub-nanometer open tunnels that provide a unique property for sensing applications. Sensor based on hollandite-type manganese oxide was investigated for amperometric detection of potassium. With an operating potential of +0.63 V versus SCE, potassium ions produce oxidation currents at the sensor, which can be exploited for quantitative determinations. The amperometric signals are linearly proportional to potassium ions concentration in the range 2.7 x 10(-4) to 9.1 x 10(-4) Mol l(-1) with a correlation coefficient of 0.9990. The construction and renewal are simple and inexpensive. (AU)

• Processo FAPESP: 05/01296-4 - Desenvolvimento de metodologia analítica empregando eletrodos modificados com oxo complexos polinucleares de rutênio encapsulado em zeolita
• Beneficiário: Marcos Fernando de Souza Teixeira
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores