Development of an Amperometric Sensor for Potassium Ions

Author(s): Teixeira MFS (Teixeira, Marcos F. S.)1, Lima AS (Lima, Alex S.)1, Seraphim PM (Seraphim, Patnicia Monteiro)1, Bocchi N (Bocchi, Nerilso) Editor(s): Bastos T; Gamboa H Source: BIODEVICES 2008: PROCEEDINGS OF THE FIRST INTERNATIONAL CONFERENCE ON BIOMEDICAL ELECTRONICS AND DEVICES, VOL 1 Pages: 198-201 Published: 2008 Times Cited: 0 References: 7 Citation Map Conference Information: 1st International Conference on Biomedical Electronics and Devices Funchal, PORTUGAL, JAN 28-31, 2008 INSTICC; Univ Madeira; IEEE EMB; Assoc Advancement Artificial Intelligence Abstract: Hollandite-type manganese oxides are nanofibrous crystals with subnanometer 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. Document Type: Proceedings Paper Language: English Author