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Sulfide and sulfate determination in water samples by means of hydrogen sulfide generation-inductively coupled plasma-atomic emission spectrometry

When sulfur is measured in natural water samples by means of inductively coupled plasma-atomic emission spectrometry (ICP-AES), its emission intensity is mainly due to sulfate. Because of its low concentration, the sulfur emission coming from sulfide can be considered negligible. In the present work, it is shown that H2S generated by previous acidification of the sample enhances the sulfur signal emission as compared to the signal that is found when the water sample is analyzed in the absence of acid. The generation of hydrogen sulfide (H2S) takes place in a coil in which sulfide reacts with a hydrochloric acid solution. When this procedure is used, sulfur emission intensity is due to both sulfate and sulfide. The contribution of sulfide is obtained by subtracting the emission intensity measured straight from the water sample from that measured in the acidic medium

The authors would like to thank the Spanish Education Ministry (Project Ref. PETRI95-0980-OP and Project Ref. CGL2004-05963-C04-03) and the Vice-Presidency for Research of the University of Alicante for the financial support for this work. M. Colon gratefully acknowledges a grant from the Spanish Ministry of Science and Technology (Ref. BES-2005-6962).

© Journal of Analytical Atomic Spectrometry, 2008, vol. 23, núm. 3, p. 416-418

Elsevier

Author: Colon i Bosch, Mireia
Iglesias Juncà, Mònica
Hidalgo Muñoz, Manuela
Todolí, J.L.
Date: 2008 March 4
Abstract: When sulfur is measured in natural water samples by means of inductively coupled plasma-atomic emission spectrometry (ICP-AES), its emission intensity is mainly due to sulfate. Because of its low concentration, the sulfur emission coming from sulfide can be considered negligible. In the present work, it is shown that H2S generated by previous acidification of the sample enhances the sulfur signal emission as compared to the signal that is found when the water sample is analyzed in the absence of acid. The generation of hydrogen sulfide (H2S) takes place in a coil in which sulfide reacts with a hydrochloric acid solution. When this procedure is used, sulfur emission intensity is due to both sulfate and sulfide. The contribution of sulfide is obtained by subtracting the emission intensity measured straight from the water sample from that measured in the acidic medium
The authors would like to thank the Spanish Education Ministry (Project Ref. PETRI95-0980-OP and Project Ref. CGL2004-05963-C04-03) and the Vice-Presidency for Research of the University of Alicante for the financial support for this work. M. Colon gratefully acknowledges a grant from the Spanish Ministry of Science and Technology (Ref. BES-2005-6962).
Format: application/pdf
ISSN: 0267-9477 (versió paper)
1364-5544 (versió electrònica)
Document access: http://hdl.handle.net/10256/12714
Language: eng
Publisher: Elsevier
Collection: MICYT/PN 2004-2007/CGL2004-05963-C04-03
Reproducció digital del document publicat a: http://dx.doi.org/10.1039/b716302a
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Is part of: © Journal of Analytical Atomic Spectrometry, 2008, vol. 23, núm. 3, p. 416-418
Rights: Tots els drets reservats
Subject: Anàlisi espectral
Spectrum analysis
Espectroscòpia atòmica
Atomic spectroscopy
Title: Sulfide and sulfate determination in water samples by means of hydrogen sulfide generation-inductively coupled plasma-atomic emission spectrometry
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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