Data/hora: 07/06/2024 05:33:21

Provedor de dados: 	5	
País: 	France	
Título: 	Sulfide determination in hydrothermal seawater samples using a vibrating gold micro-wire electrode in conjunction with stripping chronopotentiometry	
Autores: 	Aumond, Virginie; Waeles, Mathieu; Salaun, Pascal; Gibbon-walsh, Kristoff; Van Den Berg, Constant M. G.; Sarradin, Pierre-marie; Riso, Ricardo D.	
Data: 	2012-11	
Ano: 	2012	
Palavras-chave: 	Sulfide; Stripping chronopotentiometry; Vibrating electrode; Gold; Seawater; Hydrothermal.	
Resumo: 	A rapid electrochemical stripping chronopotentiometric procedure to determined sulfide in unaltered hydrothermal seawater samples is presented. Sulfide is deposited at -0.25 V (vs Ag/AgCl, KCl 3 M) at a vibrating gold microwire and then stripped through the application of a reductive constant current (typically -2 mu A). The hydrodynamic conditions are modulated by vibration allowing a short deposition step, which is shown here to be necessary to minimize H2S volatilization. The limit of detection (LOD) is 30 nM after a deposition step of 7s. This LOD is in the same range as the most sensitive cathodic voltammetric technique using a mercury drop electrode and is well below those reported previously for other electrodes capable of being implemented in situ. (C) 2012 Elsevier B.V. All rights reserved.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00111/22222/20065.pdf

DOI:10.1016/j.aca.2012.09.044	
Editor: 	Elsevier Science Bv	
Relação: 	http://archimer.ifremer.fr/doc/00111/22222/	
Formato: 	application/pdf	
Fonte: 	Analytica Chimica Acta (0003-2670) (Elsevier Science Bv), 2012-11 , Vol. 753 , P. 42-47	
Fonte: 	2012 Elsevier B.V. All rights reserved.