| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Sulfide determination in hydrothermal seawater samples using a vibrating gold micro-wire electrode in conjunction with stripping chronopotentiometry
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| Autores: |
Aumond, Virginie
Waeles, Mathieu
Salaun, Pascal
Gibbon-walsh, Kristoff
Van Den Berg, Constant M. G.
Sarradin, Pierre-marie
Riso, Ricardo D.
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| Data: |
2012-11
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| Ano: |
2012
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| Palavras-chave: |
Sulfide
Stripping chronopotentiometry
Vibrating electrode
Gold
Seawater
Hydrothermal
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| 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.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00111/22222/20065.pdf
DOI:10.1016/j.aca.2012.09.044
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| Editor: |
Elsevier Science Bv
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| Relação: |
http://archimer.ifremer.fr/doc/00111/22222/
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| Formato: |
application/pdf
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| Fonte: |
Analytica Chimica Acta (0003-2670) (Elsevier Science Bv), 2012-11 , Vol. 753 , P. 42-47
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| Direitos: |
2012 Elsevier B.V. All rights reserved.
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