𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Catalysis of Ion Transfer by Tetraphenylborates in Neutral Carrier-Based Ion-Selective Electrodes

✍ Scribed by Peter Gehrig; Werner E. Morf; Martin Welti; Ernö Pretsch; Wilhelm Simon

Publisher
John Wiley and Sons
Year
1990
Tongue
German
Weight
501 KB
Volume
73
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

For certain ionophores of extremely high lipophilicity, kinetic limitations of the carrier‐induced ion transfer between aqueous and membrane phase may heavily disturb the electromotive behaviour of the ion‐selective membrane electrode. These limitations may be overcome by adding tetraphenylborates to the membrane phase. Membranes prepared with different 3,6‐dioxaoctanediamide homologues and potassium tetrakis(P‐chlorophenyl)borate as phase‐transfer catalyst all exhibit the same ion selectivity as well as theoretical electrode response. This behaviour is corroborated by a theoretical description of the ion‐transfer process.

📜 SIMILAR VOLUMES

Neutral-carrier-based ion-selective elec
Neutral-carrier-based ion-selective electrodes
✍ P. Oggenfuss; W.E. Morf; U. Oesch; D. Ammann; E. Pretsch; W. Simon 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 703 KB

Neutral-carrier-based ion-selective electrodes for the assay of alkali and alkaline earth metal cations have advanced to become the most frequently used potentiometric sensors in clinical chemistry . The major developments since the realization of the first potentiometric cell assemblies utilizing e

Cation-Response Mechanism of Neutral Car
Cation-Response Mechanism of Neutral Carrier Based Ion-Selective Electrode Membranes
✍ Werner E. Morf; Wilhelm Simon 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 German ⚖ 696 KB

Results of voltammetric, potentiometric, chronoamperometric, ion transport, and extraction studies on neutral carrier based, plasticized polyfvinyl chloride) membranes are summarized. They unambiguously confirm that such bulk membranes dispose of immobile anionic sites. These fixed sites lead to a D

Multispectral imaging of ion transport i
Multispectral imaging of ion transport in neutral carrier-based cation-selective membranes
✍ Robert E. Gyurcsányi; Ernõ Lindner 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 773 KB

## Abstract ## Background: High‐resolution spectroscopic imaging of the cross section of ion‐selective membranes during real‐time electrochemical measurements is termed spectroelectrochemical microscopy (SpECM). SpECM is aimed for optimizing the experimental conditions in mass transport controlled

Lipophilicity of tetraphenylborate deriv
Lipophilicity of tetraphenylborate derivatives as anionic sites in neutral carrier-based solvent polymeric membranes and lifetime of corresponding ion-selective electrochemical and optical sensors
✍ Eric Bakker; Ernö Pretsch 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 985 KB

The leaching process of lipophilic anionic additives (e.g., tetraphenylborates) from neutral carrier based membranes into an aqueous sample is quantified. While the necessary lipophilicity (i.e., equilibrium partition coefficient) of the additive for a certain lifetime of the sensor is identical to