Journal
ELECTROANALYSIS
Volume 22, Issue 1, Pages 31-34Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.200900415
Keywords
Surfactants; Edge-plane pyrolytic graphite; Glassy carbon; Voltammetry; Adsorptive stripping voltammetry; Kinetics; Copper; Triton X-100; SDS
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Funding
- EPSRC [EP/D012546/1]
- Engineering and Physical Sciences Research Council [EP/D012546/1] Funding Source: researchfish
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The voltammetric performance of glassy carbon (GC) and edge-plane pyrolytic graphite (EPPG) electrodes was investigated for the oxidation of potassium ferrocyanide in aqueous solution both with and without the addition of surfactant (sodium dodecyl sulfate and Triton X-100). The heterogeneous electron transfer kinetics were determined for all cases, and it was found that the GC electrode surface was far more sensitive to the presence of surfactant than the more hydrophilic EPPG surface. This result was then applied to the electroanalysis of copper via adsorptive stripping voltammetry in the presence of Triton X-100 and it was observed that the EPPG electrode response was unaffected by up to 100 mu M of surfactant, whilst the voltammetry on the GC electrode was significantly affected by only 10 mu M.
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