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A reference electrode based on polyvinyl butyral (PVB) polymer for decentralized chemical measurements
2014 (English)In: Analytica Chimica Acta, ISSN 0003-2670, E-ISSN 1873-4324, Vol. 821, 72-80 p.Article in journal (Refereed) Published
Abstract [en]

A new solid-state reference electrode using a polymeric membrane of polyvinyl butyral (PVB), Ag/AgCl and NaCl to be used in decentralized chemical measurements is presented. The electrode is made by drop-casting the membrane cocktail onto a glassy carbon (GC) substrate. A stable potential (less than 1 mV dec−1) over a wide range of concentrations for the several chemical species tested is obtained. No significant influence to changes in redox potential, light and pH are observed. The response of this novel electrode shows good correlation when compared with a conventional double-junction reference electrode. Also good long-term stability (90 ± 33 μV/h) and a lifetime of approximately 4 months are obtained. Aspects related to the working mechanisms are discussed. Atomic Force Microscopy (AFM) studies reveal the presence of nanopores and channels on the surface, and electrochemical impedance spectroscopy (EIS) of optimized electrodes show low bulk resistances, usually in the kΩ range, suggesting that a nanoporous polymeric structure is formed in the interface with the solution. Future applications of this electrode as a disposable device for decentralized measurements are discussed. Examples of the utilization on wearable substrates (tattoos, fabrics, etc) are provided.

Place, publisher, year, edition, pages
Elsevier, 2014. Vol. 821, 72-80 p.
Keyword [en]
Reference electrode; Decentralized measurements; Solid-contact potentiometric sensors
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-206910DOI: 10.1016/j.aca.2014.02.028ISI: 000333807600007ScopusID: 2-s2.0-84897912832OAI: oai:DiVA.org:kth-206910DiVA: diva2:1094370
Note

QC 20170516

Available from: 2017-05-09 Created: 2017-05-09 Last updated: 2017-05-16Bibliographically approved

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Crespo, Gaston A.
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CiteExportLink to record
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Citation style
  • apa
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  • modern-language-association-8th-edition
  • vancouver
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  • de-DE
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  • nn-NB
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Output format
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