Highly selective detection of Epinephrine at oxidized Single-Wall Carbon Nanohorns modified Screen Printed Electrodes (SPEs)

Biosens Bioelectron. 2014 Sep 15:59:94-8. doi: 10.1016/j.bios.2014.02.065. Epub 2014 Mar 6.

Abstract

Oxidized Single-Wall Carbon Nanohorns (o-SWCNHs) were used, for the first time, to assemble chemically modified Screen Printed Electrodes (SPEs) selective towards the electrochemical detection of Epinephrine (Ep), in the presence of Serotonine-5-HT (S-5HT), Dopamine (DA), Nor-Epineprhine (Nor-Ep), Ascorbic Acid (AA), Acetaminophen (Ac) and Uric Acid (UA). The Ep neurotransmitter was detected by using Differential Pulse Voltammetry (DPV), in a wide linear range of concentration (2-2500 μM) with high sensitivity (55.77 A M(-1) cm(-2)), very good reproducibility (RSD% ranging from 2 to 10 for different SPEs), short response time for each measurement (only 2s) and low detection of limit (LOD=0.1 μM). o-SWCNHs resulted in higher analytical performances when compared with other nanomaterials used in literature for electrochemical sensors assembly.

Keywords: Neurotransmitters; SWCNHs; Screen Printed Electrodes (SPEs); Selective detection.

Publication types

  • Evaluation Study

MeSH terms

  • Biosensing Techniques / instrumentation*
  • Electrochemical Techniques / instrumentation*
  • Electrodes
  • Epinephrine / analysis*
  • Limit of Detection
  • Nanostructures / chemistry
  • Oxidation-Reduction
  • Reproducibility of Results

Substances

  • Epinephrine