Composite planar electrode for sensing electrochemical oxygen demand

Jahir Orozco, César Fernández-Sánchez, Ernest Mendoza, Mireia Baeza, Francisco Céspedes, Cecilia Jiménez-Jorquera

Research output: Contribution to journalArticleResearchpeer-review

35 Citations (Scopus)


This work reports on the development of a graphite-polystyrene composite electrode of planar configuration, containing silver(II) oxide and copper(II) oxide catalysts (AgO-CuO), for the measurement of electrochemical oxygen demand (EOD). Optimisation studies of the composite composition as well as conditions for its processing on planar substrates and generation of an appropriate electrochemical active area resulted in the scalable fabrication of robust composite electrodes. These were evaluated with glucose as target analyte. They showed competitive low limits of detection in a linear concentration range from 5 mg L-1 to 1400 mg L-1 of O2. Besides, they were stable for at least one year. The determination of EOD in wastewater samples coming from production lines of parenteral food and winemaking was successfully carried out. © 2006.
Original languageEnglish
Pages (from-to)176-182
JournalAnalytica Chimica Acta
Publication statusPublished - 28 Jan 2008


  • AgO/CuO catalysts
  • Carbon-polystyrene composite
  • Electrochemical oxygen demand
  • Planar electrode


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