A new electrode for acid-base titration based on poly(copper phthalocyanine)

Borsos, Katalin; Inzelt, György

doi:10.1007/s10008-015-2899-3

Cited by 6 publications

(1 citation statement)

References 30 publications

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“…a traceability chain can be established relating a measured pH to the pH of a primary buffer solution, the basis and the historical development of which is described by Spitzer [15]. Alternatives to the glass electrode for potentiometric sensing have been suggested, for example by Inzelt [16,17]. More generally, the use of potentiometric measurements however make precise and sensitive measurements challenging since the logarithmic relation between potential and activity results in a change of signal of a mere ca 60 mV per decade of concentration at 298 K. Apart from a glass electrode, electrode materials like carbon can be functionalised for pH sensing by various surface modifications, e.g.…”

Section: Introductionmentioning

confidence: 99%

A simplified methodology: pH sensing using an in situ fabricated Ir electrode under neutral conditions

Chen

et al. 2021

J Solid State Electrochem

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Herein, a simplified fabrication method for the producing of a pH-sensitive iridium electrode is developed. The in situ electrochemical fabrication of an iridium oxide film is optimized and shown to be achievable under neutral conditions rather than the acidic conditions hitherto employed. The formation of a pH sensitive Ir(III/IV) hydrous film is confirmed via XPS. The amperometric pH-sensing properties of this electrochemically generated material were investigated using square wave voltammetry. In the pH range 2–13, the iridium oxide redox signal has a pH dependency of 86.1 ± 1.1 mV per pH unit for midpoint potentials with uncertainties being ± 0.01–0.05 pH. Finally, the newly developed pH sensor was used to measure the pH of a natural water sample with excellent results as compared to a conventional glass pH probe.

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Section: Introductionmentioning

confidence: 99%