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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).

Elsevier

Director: Ministerio de Ciencia y Tecnología (Espanya)
Autor: Colon i Bosch, Mireia
Iglesias Juncà, Mònica
Hidalgo Muñoz, Manuela
Todolí, J.L.
Resum: 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).
Accés al document: http://hdl.handle.net/2072/298071
Llenguatge: eng
Editor: Elsevier
Drets: Tots els drets reservats
Matèria: Anàlisi espectral
Spectrum analysis
Espectroscòpia atòmica
Atomic spectroscopy
Títol: Sulfide and sulfate determination in water samples by means of hydrogen sulfide generation-inductively coupled plasma-atomic emission spectrometry
Tipus: info:eu-repo/semantics/article
Repositori: Recercat

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