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Calibrationless determination of electroactive species using chronoamperograms at collector segment of interdigitated microelectrode array

  • P. Jenčušová EMAIL logo , P. Tomčík , D. Bustin , M. Rievaj and Z. Dovalovská
Published/Copyright: June 1, 2006
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Chemical Papers
From the journal Chemical Papers Volume 60 Issue 3

Abstract

The possibility of calibrationless chronoamperometric determination is described using a pair of individually addressable and diffusion layers interacting segments of interdigitated microelectrode array (IDA). It utilizes dual voltammetric mode where the first segment is polarized with potential corresponding to the limiting current of determined species electrode reaction and the second segment is polarized with potential corresponding to the opposite electrode reaction limiting current. Time at which the current of the collector segment reaches one half of the steady state is hyperbolically dependent on the diffusion coefficient of analyte. The determination of diffusion coefficient allows direct calculation of bulk concentration avoiding calibration with a standard solution. The equipment for measuring of fast response of IDA arrays in dual mode has been developed using a bipotentiostat connected with A/D transducer. It allows less than 1 ms sampling period for ultrafast registration of chronoamperogram. The method was tested and validated with [Fe(CN)6]4−, [Ru(NH3)6]Cl3, and ferrocene model samples using various types of IDA arrays.

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Published Online: 2006-6-1
Published in Print: 2006-6-1

© 2006 Institute of Chemistry, Slovak Academy of Sciences

Articles in the same Issue

  1. Calibrationless determination of electroactive species using chronoamperograms at collector segment of interdigitated microelectrode array
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https://doi.org/10.2478/s11696-006-0032-x

Articles in the same Issue

  1. Calibrationless determination of electroactive species using chronoamperograms at collector segment of interdigitated microelectrode array
  2. The β-carotene dilemma: ESR study with coordinated peroxyl radicals
  3. Determination of 5-hydroxymethylfurfural after Winkler and by the HPLC method for authentication of honey
  4. A simple linear sweep voltammetric method for the determination of double-stranded DNA with malachite green
  5. Spectral and electrochemical study of coordination molecules Cu4OX6L4: 3-Pyridylmethanol and 4-pyridylmethanol Cu4OBrnCl(6−n)(pm)4 complexes
  6. Magnetic, spectral, and thermal behaviour of 2-chloro-4-nitrobenzoates of Co(II), Ni(II), and Cu(II)
  7. Synthesis, characterization, and biological activities of some transition metal(II) complexes with the thiosemicarbazone derived from 4-[1-(4-methylphenylsulfonyl)-1H-indol-3-yl]but-3-en-2-one
  8. Crystal structure and thermal chemical properties of 2-(2,4-dimethylanilino)-3-methyl-6-diethylaminofluorane
  9. Etherification of glycerol with tert-butyl alcohol catalysed by ion-exchange resins
  10. Synthesis and reactions of 2-and 4-substituted furo[3,2-c]pyridines
  11. Synthetic approaches towards bisspiro[naphthalene-2(1H),3′-(3H)pyrazol]-1-one-containing compounds
  12. Mild Pfitzner—Moffat oxidation of the (1→3)-β-D-glucan from Saccharomyces cerevisiae
  13. Limited sample recovery in coupled methods of high-performance liquid chromatography of synthetic polymers
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