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GalvaPot, a custom-made combination galvanostat/potentiostat and high impedance potentiometer for decentralized measurements of ionophore-based electrodes
2015 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 207, 631-639 p.Article in journal (Refereed) Published
Abstract [en]

We report here on a portable, custom-made instrument for decentralized measurements with ionophore based electrodes. It allows one to perform most common electrochemical protocols based on applied current or potential as well as zero current potentiometry measurements. Each protocol is customizable via a programmable interface by use of either an external PC or a touch screen panel on the device. The programmable interface provides flexibility to trigger peripheral devices for the additional implementation of actuators, pumps and other external devices in the electrochemical routines.

To characterize the electronic performance of the instrument, three different electrochemical protocols were used with ionophore based electrodes and compared with a commercial work station: (1) open circuit potentiometric measurements with calcium ion-selective membranes; (2) chronoamperometry based on three successive pulses with simultaneous control of fluidic delivery by a peristaltic pump and switching valve, followed by on board current integration to obtain a coulometric readout; (3) a chronopotentiometric protocol using protamine selective membranes with current pulses of 5-s duration, including an automatic computation of the time-derivative to find the transition time as the analytical signal. At 500 g, the instrument is portable yet sufficiently versatile for performing and analyzing most electrochemical measurements without the need for an external computer. It may become an attractive tool for applications in environmental and clinical analysis where field portability, flexibility and integration are desired.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 207, 631-639 p.
Keyword [en]
Custom made; Potentiometer; Potentiostat; Chronopotentiometry; Coulometry; Perm-selective membranes
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-206917DOI: 10.1016/j.snb.2014.10.084ISI: 000345895200080Scopus ID: 2-s2.0-84914162978OAI: oai:DiVA.org:kth-206917DiVA: diva2:1094360
Note

QC 20170517

Available from: 2017-05-09 Created: 2017-05-09 Last updated: 2017-05-17Bibliographically approved

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Crespo, Gaston A.
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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
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