Title :
Measuring the selectivity coefficients of a sodium sensor based on ceramic membrane
Author :
Attari, Mokhtar ; Fabry, Pierre
Author_Institution :
Inst. of Electron., Houari Boumediene Univ., Bab-Ezzouar, Algeria
Abstract :
The paper describes the measurement of selectivity coefficients of a sodium sensor based on ceramic membrane. An acquisition subsystem is realized for this purpose with a high input impedance conditioner (>1000 GΩ). The system is then used to measure voltages from four differently realized sodium sensors, and to determine the selectivity coefficients for three interfering ions. The output voltages are plotted against time to show the evolution of the output signal for different cases. Potassium, calcium and lithium are the interfering ions that have been introduced into the analyzed solution. The four sensors with membranes sintered from 900°C to 1200°C have been characterized. The system is also used with a translating mechanical apparatus to study the evolution of the transient interference
Keywords :
ceramics; chemical sensors; electrochemical analysis; electrochemical electrodes; membranes; positive ions; sodium; sodium compounds; solid electrolytes; 1000 Gohm; 900 to 1200 C; NASICON; Na; NaZrSiO4PO4; acquisition subsystem; ceramic membrane based sensor; chemical sensors; high input impedance conditioner; interfering ions; ion selective electrode sensor; ion sensors; output voltages; potentiometric sensors; selectivity coefficients measurement; sintered membranes; superionic conductor; transient interference evolution; Biomembranes; Calcium; Ceramics; Impedance; Interference; Lithium; Mechanical sensors; Sensor phenomena and characterization; Sensor systems; Voltage;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1996. IMTC-96. Conference Proceedings. Quality Measurements: The Indispensable Bridge between Theory and Reality., IEEE
Conference_Location :
Brussels
Print_ISBN :
0-7803-3312-8
DOI :
10.1109/IMTC.1996.507589
