title: Controlling the diffusion profile of electroactive species for selective anodic stripping voltammetry of cadmium at boron-doped diamond electrodes.
abstract: Selective anodic stripping voltammetry of trace metal ions in a mixture solution with another interfering metal was developed based on Fick's law concerning the diffusion profile of interfering metals at the electrode surface after electrolysis treatment. A boron-doped diamond film was used as the sensing electrode, while a perforated carbon sheet was used for the interference-depleting electrode. The influence of the electrode distance and the time of electrolysis on the formation of the diffusion profile was studied. As a working model, the detection of cadmium with copper interference was investigated. The advantage of the method in comparison to general electrolysis was also discussed. The method offers a new perspective for improving the selective detection of metal ions by analyzing the diffusion profiles of the interfering species at the surface of electrodes.
authors.affiliation: Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan.
authors.forename: Ai
authors.initials: A
authors.lastname: Sugitani
authors.forename: Takeshi
authors.initials: T
authors.lastname: Watanabe
authors.forename: Tribidasari A
authors.initials: TA
authors.lastname: Ivandini
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Iguchi
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Einaga