title: Thin film trichloroethylene electrochemical sensor.
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).
authors.affiliation: Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan.
authors.forename: Min-Hua
authors.initials: MH
authors.lastname: Chen
authors.forename: Chung-Chiun
authors.initials: CC
authors.lastname: Liu
authors.forename: Tse-Chuan
authors.initials: TC
authors.lastname: Chou
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation / Q000379:methods*; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D045424:Complex Mixtures / Q000032:analysis / Q000737:chemistry; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007854:Lead / Q000737:chemistry*; D008567:Membranes, Artificial; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014025:Titanium / Q000737:chemistry*; D014159:Transducers; D014241:Trichloroethylene / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D020099:Coated Materials, Biocompatible; D045424:Complex Mixtures; D008567:Membranes, Artificial; D014874:Water Pollutants, Chemical; D014241:Trichloroethylene; D007854:Lead; D010984:Platinum; D014025:Titanium