Chemical Papers

, Volume 73, Issue 2, pp 291–299 | Cite as

Reduced graphene oxide/graphene oxide hybrid-modified electrode for electrochemical sensing of tobramycin

  • Mojtaba HadiEmail author
  • Tahere Mollaei
Original Paper


A novel voltammetric sensor was developed for the determination of tobramycin by combining the excellent electronic conductivity of reduced graphene oxide (rGO) and the signal amplification properties of graphene oxide (GO). Compared with glassy carbon (GC), rGO-modified GC, and GO-modified GC electrodes, rGO/GO hybrid-modified GC electrode exhibited higher electrocatalytic activity toward the tobramycin electro-oxidation, with a more well-defined peak shape. The electro-oxidation peak current was found to be proportional to the tobramycin concentration in two ranges of 7.0–50.0 and 50.0–900.0 μM, with a detection limit of 2.0 μM. To control and reduce dose-dependent toxicity of aminoglycoside drugs, an accurate determination of their concentration in blood is important. While some methods have been reported so far for determination of tobramycin, as an aminoglycoside-type drug, it is vital to develop simple, sensitive, inexpensive, and fast methods for its assay in human blood samples to control its dose-dependent toxic side effects. Therefore, the above developed method was applied in the analysis of tobramycin in spiked human blood serum samples. The recovery results were satisfactory.


Graphene oxide Reduced graphene oxide Graphene oxides/reduced graphene oxide hybrid Tobramycin electro-oxidation Human blood serum sample 


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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2018

Authors and Affiliations

  1. 1.Department of Chemistry, Faculty of SciencesUniversity of QomQomIran

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