Studies on the phase boundaries and the significance of ionic sites of liquid membrane ion‐selective electrodes

Philippe Bühlmann, Setsuko Yajima, Koji Tohda, Kayoko Umezawa, Seiichi Nishizawa, Yoshio Umezawa

研究成果: ジャーナルへの寄稿総説査読

97 被引用数 (Scopus)

抄録

Attenuated total reflectance infrared spectroscopy (ATR‐IR) has been used to study the cation permselectivity of liquid‐membrane ion‐selective electrodes (ISEs). All spectroscopic evidence was found to agree with the interpretation of permselectivity as being due to complete exclusion of counter‐ions from the boundary phase. Compared to ATR‐IR, optical second harmonic generation (SHG) has an even more pronounced surface sensitivity. It has been demonstrated to be a promising new technique for the study of ISE response mechanisms, as it allows one to observe the actual phase boundary. On the other hand, further potentiometric evidence for the influence of ionic sites on the emf response was found, both by a study of membranes free of ionic sites as well as by the investigation of leaching processes at poly(viny1 chloride) membranes. Finally, the use of a photoresponsive crown ether ionophore allowed the determination of emf response characteristics in relation to the ionophore concentration without any changes in the membrane composition.

本文言語英語
ページ(範囲)811-816
ページ数6
ジャーナルElectroanalysis
7
9
DOI
出版ステータス出版済み - 1995 9月

フィンガープリント

「Studies on the phase boundaries and the significance of ionic sites of liquid membrane ion‐selective electrodes」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル