Sensors & Transducers Journal
(ISSN 1726- 5479)
Vol. 76, Issue 2, February 2007, pp. 991-1000
Design and Characterization of a Solid-State Piezoelectric Transducer Chemical Sensor for Chromium Ions Contamination in Water
Department of Physics, Alabama A & M University
P.O. Box 1268, Normal, AL35762, USA
Phone: 256 880 8533, fax: 256 732 5622
Received: 7 February 2007 / Accepted: 22 February 2007 / Published: 26 February 2007
Abstract: The current need for Environmental Protection Agencies (EPA) is portable sensors, which could be used for long time monitoring of our environment. This includes sensors for identifying contaminated water with poisonous ions. Thus, this paper is reporting on design and characterization of solid-state piezoelectric transducer chemical sensors for detecting chromium ions in the water. For calibration purpose, two similar sensors were designed and tested before and after being loaded with analytical solution. Analysis part included RBS, ICP, and electrical characterization. The results obtained from the first sensor showed that the change in small signal voltages were proportional to the mass of purified water added to the top of chromium electrode. The result obtained from the second sensor proved it to be very selective to chromium ions suspended in the solution. Finally, it was concluded that sensor 2 could be used to detect more than 0.37 ppm of chromium ions concentration in the water.
Keywords: Electrode, transducers, genetic screening, food analysis, bioterrorism, environment monitoring
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