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Silicate electrochemical measurements in seawater: Chemical and analytical aspects towards a reagentless sensor

Lacombe, Marielle and Garçon, Véronique and Thouron, Danièle and Le Bris, Nadine and Comtat, Maurice Silicate electrochemical measurements in seawater: Chemical and analytical aspects towards a reagentless sensor. (2008) Talanta, vol. 7 (n° 2 ). pp. 744-750. ISSN 0039-9140

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.talanta.2008.07.023


Fromthe study of molybdenum oxidation in aqueous solutionswe developed a semi-autonomousmethod to detect silicate in aqueous samples. Molybdenum oxidationwas used to form molybdate in acidicmedia. The silicomolybdic complex formed with silicate is detectable by amperometry or cyclic voltammetry. The newelectrochemical method is in good agreement with the method conventionally used for environmentalwater silicate analysis. In the second stage, a completely reagentless methodwas developed using molybdate and proton produced during molybdenum oxidation. Reproducibility tests showa precision of 2.6% for a concentration of 100mol L−1. This new method will be very suitable for the development of newautonomous silicate sensors easy to handle and without reagents. In this paperwe present the analytical and chemical aspects necessary for a complete documentation of the method before the development of a new reagentless sensor.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Talanta website : http://www.sciencedirect.com/science/journal/00399140
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut Français de Recherche pour l'Exploitation de la MER - IFREMER (FRANCE)
French research institutions > Centre National des Etudes Spatiales - CNES (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
French research institutions > Institut de Recherche pour le Développement - IRD (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Laboratory name:
Deposited By: Hélène Dubernard
Deposited On:13 Nov 2008 10:11

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