Thin film trichloroethylene electrochemical sensor

Min Hua Chen, Chung Chiun Liu, Tse Chuan Chou

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Pt-Ti and Pb-Pt-Ti thin films were deposited on alumina substrates by sputtering in Ar gas. In this study, an electrodeposited Pb-modified Pt-Ti thin film working electrode was prepared. Optimal sensing conditions were found to be -2.10 V (versus Ag/Ag+ with 0.1 M tetrabutylammonium perchlorate (TBAP) in acetonitrile (AN) solution) sensing potential, 250 rpm agitation rate. At room temperature, the response time was 15 s (90% response time). The correlation of sensing response current, id, and trichloroethylene (TCE) concentration, CL, is id=2.86CL in the range from 100 to 700 ppm TCE. Additionally, the rate constant of (TCE) cathodic reduction was found to be 2.434×10-3 cm-1 s -1.

Original languageEnglish
Pages (from-to)25-32
Number of pages8
JournalBiosensors and Bioelectronics
Volume20
Issue number1
DOIs
StatePublished - 30 Jul 2004

Keywords

  • Electrodeposited Pb-modified Pt-Ti thin film
  • Sensor
  • Trichloroethylene

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