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Title of Journal: J Appl Electrochem

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Abbravation: Journal of Applied Electrochemistry

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Springer Netherlands

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DOI

10.1007/bf00925768

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1572-8838

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Voltammetric determination of the critical micella

Authors: Charlotte Racaud Karine Groenen Serrano André Savall
Publish Date: 2010/05/18
Volume: 40, Issue: 10, Pages: 1845-1851
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Abstract

The electrochemistry of three surfactants has been studied by voltammetry at boron doped diamond BDD electrode in sodium sulphate solutions The electrochemical behaviour of these surfactants is characterized by an oxidation signal peak or wave situated before the electrolyte oxidation The anodic current is found to follow a linear relation with the concentration of the surfactants the slope decreases abruptly above the critical micellar concentration CMC of the surfactants The CMC values obtained for an anionic sodium dodecylbenzenesulfonate SDBS a cationic polyoxyethylene23dodecyl ether BRIJ 35 and a neutral 1hexadecyltrimethylammonium bromide CTAB surfactant are found in good agreement with those measured by the classical technique of surface tension This voltammetric method has the advantage not to require the use of a redox active electrochemical probe

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