Coated-Wire Ion-Selective Electrodes

Cattrall, Robert W.; Hamilton, I.C.

doi:10.1016/b978-0-08-033201-7.50009-8

Cited by 98 publications

(30 citation statements)

References 83 publications

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“…Planar sensors prepared like "coated wire" electrodes (with an ion-selective membrane cast directly over an electronically conducting metal/semiconductor surface, e.g., Pt, Au, a conductive polymer, or the gate area of a field effect transistor [89,90]), without IFS or with extremely small IFS volume, were very sensitive to transmembrane fluxes (e.g., H 2 O, CO 2 , O 2 , etc). They required longer equilibration (conditioning) time [67,88] and were characterized by drifting potentials and modest repeatibility.…”

Section: Planar Microfabricated Electrodesmentioning

confidence: 99%

Performance evaluation criteria for preparation and measurement of macro- and microfabricated ion-selective electrodes (IUPAC Technical Report)

Lindner¹,

Umezawa

2008

Pure and Applied Chemistry

234

168

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Over the last 30 years, IUPAC published several documents with the goal of achieving standardized nomenclature and methodology for potentiometric ion-selective electrodes (ISEs). The ISE vocabulary was formulated, measurement protocols were suggested, and the selectivity coefficients were compiled. However, in light of new discoveries and experimental possibilities in the field of ISEs, some of the IUPAC recommendations have become outdated. The goal of this technical report is to direct attention to ISE practices and the striking need for updated or refined IUPAC recommendations which are consistent with the state of the art of using macro- and microfabricated planar microelectrodes. Some of these ISE practices have never been addressed by IUPAC but have gained importance with the technological and theoretical developments of recent years. In spite of its recognized importance, a generally acceptable revision of the current IUPAC recommendations is far beyond the scope of this work.

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Section: Planar Microfabricated Electrodesmentioning

confidence: 99%

Performance evaluation criteria for preparation and measurement of macro- and microfabricated ion-selective electrodes (IUPAC Technical Report)

Lindner¹,

Umezawa

2008

Pure and Applied Chemistry

234

168

View full text Add to dashboard Cite

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“…ISE with a solid inner contact, known as coated-wire electrodes, were introduced many years ago [11][12][13]. It was, however, reported that their long-term potential stability was limited and they were, therefore, useful only in specific applications such as detectors for capillary electrophoresis [14] or in flow-injection analysis [15].…”

Section: Introductionmentioning

confidence: 99%

A polypyrrole-based solid-contact Pb2+-selective PVC-membrane electrode with a nanomolar detection limit

et al. 2004

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Ion-selective electrodes (ISE) based on conventional plasticized PVC membranes with solid inner contact (SC) have so far had unsatisfactory lower detection limits. Here it is shown that electropolymerization of pyrrole in the presence of potassium hexacyanoferrate(II)/(III) on Pt results in adequate inner contact for SC-ISE. The nanomolar lower detection limit achieved with the Pb 2+ -selective PVC membranes investigated is comparable with values obtained with optimized internal solutions of liquid-contact ISE.

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“…1 More recently, two types of potentiometric wiretype electrodes (WTEs), such as coated wire electrodes (CWEs) 2 and solid contact electrodes (SCEs), 3,4 have exhibited rapid development. In WTEs, a total elimination of the internal filling solution provides new advantages.…”

Section: Introductionmentioning

confidence: 99%

A Hydrogen Ion-Selective Poly(aniline) Solid Contact Electrode Based on Dibenzylpyrenemethylamine Ionophore for Highly Acidic Solutions

et al. 2004

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Ion-selective electrodes (ISEs) are chemical sensors with the longest history, and still probably have the largest number of applications. 1 More recently, two types of potentiometric wiretype electrodes (WTEs), such as coated wire electrodes (CWEs) 2 and solid contact electrodes (SCEs), 3,4 have exhibited rapid development. In WTEs, a total elimination of the internal filling solution provides new advantages. Simplicity of design, lower costs, mechanical flexibility, the possibility of miniaturization and microfabrication has widened the applications for WTEs in the fields of medicine and biotechnology. In SCEs of these two advanced types of WTEs, after polymerization, these polymer-coated metal electrodes were dipped into a PVC cocktail membrane solution until a bead was formed. Especially, these SCEs based on the electropolymerization method of amino derivatives onto the metal surface produced very good results, such as stabilization of the base potential, reproducibility, best selectivity, wide response ranges and fast response time. 5,6 Thus, in recent years, there have been many reports on hydrogen ion-selective SCEs 7 and hydrogen ion-selective ionophores. 8 We have studied hydrogen ion-selective ionophores and SCEs in our laboratory. 9After Simon 10 published information about tridodecylamine ionophore for hydrogen sensing, we synthesized various types of tertiary amine compound ionophores, and strived to understand the response characteristics of these ionophores. [11][12][13][14][15] Particularly, after our result concerning SCE based on the tribenzylamine (TBA) ionophore 16 was published, which had a wider response range than the electrodes with tridodecylamine (TDDA) ionophore, many types of aromatic tertiary amine compound ionophores were synthesized and studied. [17][18][19][20][21] We found that the response ranges shifted to an alkali range (toward pH 14) by extending the chain length between the phenyl ring and nitrogen in the ionophores, and were able to synthesize ionophores that exhibited a linear response up to pH 14. 22 As can be seen in the various results published until now on aromatic and aliphatic ionophores, however, there have been no reports on ionophores that are particularly effective in a strong acidic solution.In the present work, amine compound ionophores that could respond linearly to strong acid were synthesized, which has been noted as a limit of SPM (solvent polymeric membrane) ionophores, [13][14][15][16][17][18][19][20][21][22] and response characteristic due to structural changes of the ionophores in strong acid were demonstrated. Especially, we examined the responses resulting from increasing numbers of phenyl rings in ionophores, which had not been previously studied. Additionally, other common pH response characteristics of all solid-state potentiometric sensors for hydrogen ion based on poly(aniline), covered with a plastic PVC membrane and activated by these ionophores, are presented and evaluated in terms of analytical applications, such as in artificial serum an...

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Coated-Wire Ion-Selective Electrodes

Cited by 98 publications

References 83 publications

Performance evaluation criteria for preparation and measurement of macro- and microfabricated ion-selective electrodes (IUPAC Technical Report)

Performance evaluation criteria for preparation and measurement of macro- and microfabricated ion-selective electrodes (IUPAC Technical Report)

A polypyrrole-based solid-contact Pb2+-selective PVC-membrane electrode with a nanomolar detection limit

A Hydrogen Ion-Selective Poly(aniline) Solid Contact Electrode Based on Dibenzylpyrenemethylamine Ionophore for Highly Acidic Solutions

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