Voltammetric Determination of Tumor Biomarkers for Neuroblastoma (Homovanillic Acid, Vanillylmandelic Acid, and 5-Hydroxyindole-3-acetic Acid) at Screen-printed Carbon Electrodes

Anna Makrlíková, Evangelia Ktena, Anastasios Economou, Jan Fischer, Tomáš Navrátil, Jiří Barek, Vlastimil Vyskočil

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Three tumor biomarkers (homovanillic acid (HVA), vanillylmandelic acid (VMA), and 5-hydroxyindole-3-acetic acid (5-HIAA)) have been determined by differential pulse voltammetry (DPV) at screen-printed carbon electrodes (SPCEs). As an optimum medium for all three analytes, Britton-Robinson buffer (0.04 mol ⋅ L−1, pH 3.0) was used. Dependencies of the peak current on the concentration of a biomarker were linear in the concentration range from 0.2 to 100 μmol ⋅ L−1 for all the tested compounds, with the limits of quantification 0.8 μmol ⋅ L−1 for homovanillic acid, 0.2 μmol ⋅ L−1 for vanillylmandelic acid, and 0.4 μmol ⋅ L−1 for 5-hydroxyindole-3-acetic acid. Moreover, it was verified that the newly developed methods can be used for simultaneous determination of HVA and VMA in mixture.

Original languageEnglish
Pages (from-to)146-153
Number of pages8
JournalElectroanalysis
Volume29
Issue number1
DOIs
Publication statusPublished - 1 Jan 2017
Externally publishedYes

Keywords

  • 5-Hydroxyindole-3-acetic acid
  • Differential pulse voltammetry
  • Homovanillic acid
  • Screen-printed carbon electrodes
  • Vanillylmandelic acid

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

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