Journal of Applied Electrochemistry

, Volume 40, Issue 10, pp 1845–1851 | Cite as

Voltammetric determination of the critical micellar concentration of surfactants by using a boron doped diamond anode

  • Charlotte Racaud
  • Karine Groenen Serrano
  • André Savall
Original Paper


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 (polyoxyethylene-23-dodecyl ether, BRIJ 35) and a neutral (1-(hexadecyl)trimethylammonium 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.


Surfactants Critical micellar concentration Boron doped diamond Voltammetry 


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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Charlotte Racaud
    • 1
  • Karine Groenen Serrano
    • 1
  • André Savall
    • 1
  1. 1.Laboratoire de Génie Chimique, CNRSUniversité Paul SabatierToulouse Cedex 9France

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