title: Amperometric determination of sulfide at a pre-oxidised nickel electrode in acidic media.
abstract: The electrochemical response of a pre-oxidised nickel electrode to increasing additions of sulfide has been examined and shown to produce a stripping-like voltammetric wave. A mechanism is described based on the formation of nickel sulfide at the electrode surface from a non-electroactive nickel oxide layer. The analytical utility of the approach has been examined and a linear range from 1 to 140 microM and a limit of detection of 0.8 microM is achievable, depending on the accumulation time.
authors.affiliation: Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, UK OX1 3QZ.
authors.forename: Debora
authors.initials: D
authors.lastname: Giovanelli
authors.forename: Nathan S
authors.initials: NS
authors.lastname: Lawrence
authors.forename: Li
authors.initials: L
authors.lastname: Jiang
authors.forename: Timothy G J
authors.initials: TG
authors.lastname: Jones
authors.forename: Richard G
authors.initials: RG
authors.lastname: Compton
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D009532:Nickel; D013056:Spectrophotometry, Ultraviolet; D013440:Sulfides / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D013440:Sulfides; D009532:Nickel