Stability and lifetime of potassium solid-contact ion selective electrodes for continuous and autonomous measurements

Kyle McElhoney, Glen O'Neil, Nikos A. Chaniotakis, Samuel P. Kounaves

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)

Abstract

The current generation of solid-contact ion-selective electrodes (SC-ISE) suffer from lack of stability and lifetime. When using such sensors for remote, continuous, or autonomous measurements, these analytical characteristics are especially critical. In this work we compare several different configurations of ISEs to be deployed for monitoring in extreme environments, and present a novel configuration to improve performance. In particular we compare a polymeric hydrogel-based ISE, used previously in the Wet Chemistry Lab on the Phoenix Mars Lander, with three variations of solid supported nanoporous carbon-based ISEs. The symmetric membrane (SM) solid contact ISE (SM-SC-ISE) shows promise in overcoming many of the analytical problems encountered with hydrogel and solid-state devices. The results indicate that sensors based on the SM configuration provide improvements in both stability, and most importantly reproducibility, over other existing SC-ISEs. Future work will continue testing the SM configuration for use in a variety of extreme environments, including continuous monitoring and in-situ analyses in extraterrestrial environments.

Original languageEnglish
Pages (from-to)2071-2078
Number of pages8
JournalElectroanalysis
Volume24
Issue number11
DOIs
StatePublished - 1 Nov 2012

Fingerprint

Ion selective electrodes
Potassium
Hydrogel
Membranes
Hydrogels
Solid state devices
Monitoring
Sensors
Carbon
Testing

Keywords

  • Lifetime
  • Porous carbon
  • Solid-contact ion-selective electrodes
  • Stability
  • Symmetric membrane

Cite this

McElhoney, Kyle ; O'Neil, Glen ; Chaniotakis, Nikos A. ; Kounaves, Samuel P. / Stability and lifetime of potassium solid-contact ion selective electrodes for continuous and autonomous measurements. In: Electroanalysis. 2012 ; Vol. 24, No. 11. pp. 2071-2078.
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Stability and lifetime of potassium solid-contact ion selective electrodes for continuous and autonomous measurements. / McElhoney, Kyle; O'Neil, Glen; Chaniotakis, Nikos A.; Kounaves, Samuel P.

In: Electroanalysis, Vol. 24, No. 11, 01.11.2012, p. 2071-2078.

Research output: Contribution to journalArticleResearchpeer-review

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