title: Identification and on-line monitoring of reduced sulphur species (RSS) by voltammetry in oxic waters.
abstract: Based on automatic on-line measurements on the Deûle River that showed daily variation of a peak around -0.56V (vs Ag|AgCl 3M), identification of Reduced Sulphur Species (RSS) in oxic waters was performed applying cathodic stripping voltammetry (CSV) with the hanging mercury drop electrode (HMDE). Pseudopolarographic studies accompanied with increasing concentrations of copper revealed the presence of elemental sulphur S(0), thioacetamide (TA) and reduced glutathione (GSH) as the main sulphur compounds in the Deûle River. In order to resolve these three species, a simple procedure was developed and integrated in an automatic on-line monitoring system. During one week monitoring with hourly measurements, GSH and S(0) exhibited daily cycles whereas no consequential pattern was observed for TA.
authors.affiliation: Laboratoire Géosystèmes, UMR 8217, CNRS-Université Lille 1, Avenue Paul Langevin, 59655 Villeneuve d'Ascq, France.
authors.forename: Pierre-Jean
authors.initials: PJ
authors.lastname: Superville
authors.forename: Ivanka
authors.initials: I
authors.lastname: Pižeta
authors.forename: Dario
authors.initials: D
authors.lastname: Omanović
authors.forename: Gabriel
authors.initials: G
authors.lastname: Billon
mesh_terms: D004784:Environmental Monitoring; D005978:Glutathione / Q000032:analysis*; D007854:Lead / Q000032:analysis; D009862:Online Systems; D045483:Rivers / Q000737:chemistry*; D013455:Sulfur / Q000032:analysis*; D013853:Thioacetamide / Q000032:analysis*; D015032:Zinc / Q000032:analysis
chemical_list: D013853:Thioacetamide; D007854:Lead; D013455:Sulfur; D005978:Glutathione; D015032:Zinc