Voltammetric characterization and amperometric detection of β-carboline alkaloids at carbon nanotube-modified electrodes

被引:16
|
作者
Agui, L. [1 ]
Pena-Farfal, C. [1 ]
Yanez-Sedeno, R. [1 ]
Pingarron, J. M. [1 ]
机构
[1] Univ Complutense Madrid, Fac Chem, Dept Analyt Chem, E-28040 Madrid, Spain
关键词
carbon nanotube-modified electrodes; beta-carboline alkaloids; amperometric detection;
D O I
10.1002/elan.200603716
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The voltammetric behavior of beta-carboline alkaloids at carbon nanotubes-modified glassy carbon electrodes, as well as their quantification by amperometric monitoring of the oxidation responses, are reported. Cyclic voltammograms of harmane, harmine, harmaline and harmalol at the CNT-GCE showed enhanced voltammetric responses with respect to those obtained at a bare GCE. The effect of pH on the oxidation i(p) and E-p values obtained by differential pulse voltammetry was discussed, as well as their mechanistic aspects. Hydrodynamic voltammogram of these compounds led us to select a potential value of +900 mV for their amperometric detection. Under these conditions, no fouling of the modified electrode surface is evidenced. The HPLC separation and determination of P-carboline alkaloids were carried out using a mobile phase consisting of 20% (v/v) methanol-20% (v/v) acetonitrile-0.05 mol L-1 HPO42- solution of pH 9.0. Detection limits ranging between 28 nM (harmalol) and 88 nM (harmaline) were achieved. The usefulness of the chromatographic method with amperometric detection at the CNT-GCE was demonstrated by analyzing soy seeds samples spiked with harmaline, harmane and harmine at a 0.25 mu g/g level.
引用
收藏
页码:237 / 243
页数:7
相关论文
共 50 条
  • [1] Analysis of polyphenols in white wine by CZE with amperometric detection using carbon nanotube-modified electrodes
    Moreno, Monica
    Sanchez Arribas, Alberto
    Bermejo, Esperanza
    Zapardiel, Antonio
    Chicharro, Manuel
    [J]. ELECTROPHORESIS, 2011, 32 (08) : 877 - 883
  • [2] Electrocatalytic detection of insulin at RuOx/carbon nanotube-modified carbon electrodes
    Wang, Joseph
    Tangkuaram, Tanin
    Loyprasert, Suchera
    Vazquez-Alvarez, Terannie
    Veerasai, Waret
    Kanatharana, Proespichaya
    Thavarungkul, Panote
    [J]. ANALYTICA CHIMICA ACTA, 2007, 581 (01) : 1 - 6
  • [3] Carbon nanotube-modified glassy carbon electrode for anodic stripping voltammetric detection of Uranyle
    Ahmad Nozad Golikand
    Mehdi Asgari
    Mohammad Ghannadi Maragheh
    Elaheh Lohrasbi
    [J]. Journal of Applied Electrochemistry, 2009, 39 : 65 - 70
  • [4] Analysis of total polyphenols in wines by FIA with highly stable amperometric detection using carbon nanotube-modified electrodes
    Sanchez Arribas, Alberto
    Martinez-Fernandez, Marta
    Moreno, Monica
    Bermejo, Esperanza
    Zapardiel, Antonio
    Chicharro, Manuel
    [J]. FOOD CHEMISTRY, 2013, 136 (3-4) : 1183 - 1192
  • [5] Carbon nanotube-modified glassy carbon electrode for anodic stripping voltammetric detection of Uranyle
    Golikand, Ahmad Nozad
    Asgari, Mehdi
    Maragheh, Mohammad Ghannadi
    Lohrasbi, Elaheh
    [J]. JOURNAL OF APPLIED ELECTROCHEMISTRY, 2009, 39 (01) : 65 - 70
  • [6] Electrochemical detection of phenolic estrogenic compounds at carbon nanotube-modified electrodes
    Vega, D.
    Agui, L.
    Gonzalez-Cortes, A.
    Yanez-Sedeno, R.
    Pingarron, J. M.
    [J]. TALANTA, 2007, 71 (03) : 1031 - 1038
  • [7] Detection of Trace Heavy Metal Ions Using Carbon Nanotube-Modified Electrodes
    Morton, Jeffrey
    Havens, Nathaniel
    Mugweru, Amos
    Wanekaya, Adam K.
    [J]. ELECTROANALYSIS, 2009, 21 (14) : 1597 - 1603
  • [8] Carbon nanotube-modified electrodes for solar energy conversion
    Umeyama, Tomokazu
    Imahori, Hiroshi
    [J]. ENERGY & ENVIRONMENTAL SCIENCE, 2008, 1 (01) : 120 - 133
  • [9] Comparative study for voltammetric investigation and trace determination of pramipexole at bare and carbon nanotube-modified glassy carbon electrodes
    Bozal-Palabiyik, Burcin
    Uslu, Bengi
    [J]. IONICS, 2016, 22 (12) : 2519 - 2528
  • [10] Comparative study for voltammetric investigation and trace determination of pramipexole at bare and carbon nanotube-modified glassy carbon electrodes
    Burcin Bozal-Palabiyik
    Bengi Uslu
    [J]. Ionics, 2016, 22 : 2519 - 2528