Thin film trichloroethylene electrochemical sensor

Biosens Bioelectron. 2004 Jul 30;20(1):25-32. doi: 10.1016/j.bios.2004.01.017.

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 x 10(-3) cm(-1) s(-1).

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Biosensing Techniques / instrumentation
  • Biosensing Techniques / methods*
  • Coated Materials, Biocompatible / chemistry
  • Complex Mixtures / analysis
  • Complex Mixtures / chemistry
  • Electrochemistry / instrumentation
  • Electrochemistry / methods*
  • Electrodes*
  • Environmental Monitoring / instrumentation
  • Environmental Monitoring / methods
  • Equipment Design
  • Equipment Failure Analysis
  • Lead / chemistry*
  • Membranes, Artificial
  • Oxidation-Reduction
  • Platinum / chemistry*
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Titanium / chemistry*
  • Transducers
  • Trichloroethylene / analysis*
  • Trichloroethylene / chemistry
  • Water Pollutants, Chemical / analysis

Substances

  • Coated Materials, Biocompatible
  • Complex Mixtures
  • Membranes, Artificial
  • Water Pollutants, Chemical
  • Trichloroethylene
  • Lead
  • Platinum
  • Titanium