OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

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

Comtat, Maurice and Garçon, Véronique and Lacombe, Marielle and Le Bris, Nadine and Thouron, Danièle Silicate electrochemical measurements in seawater: chemical and analytical aspects towards a reagentless sensor. (2008) Talanta, Vol. 77 (n° 2). pp.744-750. ISSN 0039-9140

[img](Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
607Kb

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

Abstract

From the study of molybdenum oxidation in aqueous solutions we developed a semi-autonomous method to detect silicate in aqueous samples. Molybdenum oxidation was used to form molybdate in acidic media. The silicomolybdic complex formed with silicate is detectable by amperometry or cyclic voltammetry. The new electrochemical method is in good agreement with the method conventionally used for environmental water silicate analysis. In the second stage, a completely reagentless method was developed using molybdate and proton produced during molybdenum oxidation. Reproducibility tests show a precision of 2.6% for a concentration of 100 μmol L−1. This new method will be very suitable for the development of new autonomous silicate sensors easy to handle and without reagents. In this paper we 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:Act from 14th International Conference on Flow Injection Analysis and Related Techniques
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
French research institutions > Institut Français de Recherche pour l'Exploitation de la MER - IFREMER
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
?? ifremer_FR ??
Laboratory name:
Statistics:download
Deposited By:Guylène Abadie

Repository Staff Only: item control page