Services on Demand
Journal
Article
Indicators
Cited by SciELO
Access statistics
Related links
Similars in SciELO
Share
Journal of applied research and technology
On-line version ISSN 2448-6736Print version ISSN 1665-6423
Abstract
HERNANDEZ, P.R.; GALAN, C.A.; MORALES, A. and ALEGRET, S.. Measuring system for amperometric chemical sensors using the three-electrode technique for field application. J. appl. res. technol [online]. 2003, vol.1, n.2, pp.107-113. ISSN 2448-6736.
A portable and low cost measuring system for amperometric chemical sensors using the three-electrode technique was developed. This technique allows chemical sensors to work with currents higher than ten microamperes. The system was based on a potentiostat operation, completed with an I-V converter and signal conditioning circuits. The instrument was evaluated comparing calibration curves of hydrogen peroxide, proving several amperometric chemical sensors and biosensors, to those obtained from a very expensive commercial equipment. Good linearity and sensibility as well as low noise measurements were obtained. Moreover, because the reduced size and low cost, the instrument allows to be used directly in field applications.
Keywords : Electrochemical sensors; amperometric sensors; amperometric unit; ampermeter.