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MES research in electrode, performance. Abstract A modified carbon paste electrode was constructed for the d...

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Abstract

Abstract A modified carbon paste electrode was constructed for the determination of dissolved oxygen using diamino‐ o ‐benzoquinone (DABQ) as the modifier. The electrochemical behavior of the electrode in citrate buffer (pH 2.0) was studied. In the presence of dissolved oxygen (DO) both cathodic and anodic peak currents decreased, indicating a chemical reaction between modifier and O 2 . The decrease in peak current was linearly proportional to the amount of dissolved oxygen in the concentration range of 252–1260 μM of DO. The electrode was utilized in the determination of DO in urine samples. The relative error and RSD of the method were 1.6% and 4.1%, respectively. The electrode was applied more than two months for the determination of DO without any significant divergence in its voltammetric response.

Keywords

ElectrodeElectrochemistryCarbon paste electrodeOxygenAnodeCarbon fibers

Identifiers

DOI
10.1002/elan.200804410
Journal
Electroanalysis
Year
2009