A multisensor for electrochemical sequential autonomous automatic measurements

Tomáš Navrátil, Bogdan Yosypchuk, Jiří Barek

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The newly designed sensor is suitable for the analysis of small sample volumes (50 to 200 μL). Therefore, it seems to be especially suitable for DNA analysis. The tested multisensor contains 8 different working electrodes (4 solid amalgam, gold, copper, platinum, and glassy carbon electrodes) and one platinum auxiliary electrode. The electrochemical cell is covered with a special calomel amalgam electrode. Therefore, the analyzed liquid sample is separated from the outer area. Successful tests with the 8-electrode multisensor were performed in connection with the computer-controlled Multielchem device, which enabled one to set up different measurement methods for each sensor {e.g. DCP, DCV, CV, DPV, PSA, DPSA, SVW, chronoamperometry, coulometry), 2- or 3-electrode mode, different parameters of measurement and electrochemical regeneration of each working electrode before every scan, independently for each channel. During determination, 1 to 8 identical or different working electrodes can be connected o the Multielchem device. They can be totally independent or arranged in the 8-electrode multisensor. Theoretically, each working electrode can be accompanied by its own reference electrode, or only one common reference electrode can be used for all channels. The main advantage of the proposed device (multisensor in connection with Multielchem) is that it offers a possibility of selection of a different method and different operational, pretreatment, regeneration and measurement parameters for each sensor (the built-in function). The electrodes in the tested multisensor are fully autonomous and the measurements with particular sensors are realized in the programmed sequence (at one time only one sensor is active; the others are at open circuit). The application of 8-working electrode multisensor in combination with 8-chan-nel voltammetric/potentiometric computer-controlled Multielchem device, described in detail in this paper, substantially simplifies complex electrochemical measurements, increases the efficiency of the measurements, and - due to the intuitive and easily controllable software - decreases the demands concerning the operator's qualifications. The electrode materials used are non-toxic and can be applied practically in any laboratory, or even in field measurements.

Original languageEnglish
Pages (from-to)3-17
Number of pages15
JournalChemia Analityczna
Volume54
Issue number1
Publication statusPublished - 9 Jun 2009
Externally publishedYes

Fingerprint

Electrodes
Sensors
Mercury amalgams
Platinum
Coulometers
Chronoamperometry
Electrochemical cells
Glassy carbon
Gold
Copper
Networks (circuits)
DNA
Liquids

Keywords

  • Chronopotentiometry
  • Glassy carbon electrode
  • Gold electrode
  • Multisensor
  • Nucleic acid bases
  • Platinum electrode
  • Solid amalgam electrodes
  • Solid composite electrodes
  • Voltammetry

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

A multisensor for electrochemical sequential autonomous automatic measurements. / Navrátil, Tomáš; Yosypchuk, Bogdan; Barek, Jiří.

In: Chemia Analityczna, Vol. 54, No. 1, 09.06.2009, p. 3-17.

Research output: Contribution to journalArticle

Navrátil, Tomáš ; Yosypchuk, Bogdan ; Barek, Jiří. / A multisensor for electrochemical sequential autonomous automatic measurements. In: Chemia Analityczna. 2009 ; Vol. 54, No. 1. pp. 3-17.
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