Surface chemistry and potential response of copper sulfide based ion-selective membrane in ligand solutions

Yoshio Umezawa, Koreshige Ito, Hiroshi Hata, Masao Sugawara, Etelka Graf Harsányi, K. Tóth, Ernö Pungor, Mitsuyuki Soma, Atsushi Tanaka

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Dissolution of membraneous composite ions of copper sulfide precipitate-based ion-selective electrodes (ISEs) has been measured in various ligand solutions by ICP atomic emission spectrometry and atomic absorption spectrometry from the solution side and by X-ray photoelectron spectrometry on the electrode surface. Asymmetric dissolution, amount of copper dissolved is higher than that of sulfur, was generally observed. The copper dissolution is correlated with the potential response as well as conditional stability constants. The results are discussed in terms of the charge separation caused by the asymmetric dissolution and electrostatic interaction of charged ligands with the space charge on the electrode surface in view of microscopic characterization of ISEs in metal buffer solutions in general. The results were also used to clarify the reason for some discrepancies of complex stability constants obtained by precipitate-based ISEs and other methods.

Original languageEnglish
Pages (from-to)231-239
Number of pages9
JournalMikrochimica Acta
Volume100
Issue number3-4
DOIs
Publication statusPublished - May 1990

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Ion selective membranes
Sulfides
Surface chemistry
Copper
Dissolution
Ligands
Spectrometry
Precipitates
Atomic absorption spectrometry
Electrodes
Photoelectrons
Coulomb interactions
Electric space charge
Sulfur
Buffers
Metals
Ions
X rays
Composite materials
Ion-Selective Electrodes

Keywords

  • charge separation
  • membrane dissolution
  • metal buffer solution
  • precipitate-based ion-selective electrode
  • surface characterization

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Surface chemistry and potential response of copper sulfide based ion-selective membrane in ligand solutions. / Umezawa, Yoshio; Ito, Koreshige; Hata, Hiroshi; Sugawara, Masao; Harsányi, Etelka Graf; Tóth, K.; Pungor, Ernö; Soma, Mitsuyuki; Tanaka, Atsushi.

In: Mikrochimica Acta, Vol. 100, No. 3-4, 05.1990, p. 231-239.

Research output: Contribution to journalArticle

Umezawa, Y, Ito, K, Hata, H, Sugawara, M, Harsányi, EG, Tóth, K, Pungor, E, Soma, M & Tanaka, A 1990, 'Surface chemistry and potential response of copper sulfide based ion-selective membrane in ligand solutions', Mikrochimica Acta, vol. 100, no. 3-4, pp. 231-239. https://doi.org/10.1007/BF01244846
Umezawa, Yoshio ; Ito, Koreshige ; Hata, Hiroshi ; Sugawara, Masao ; Harsányi, Etelka Graf ; Tóth, K. ; Pungor, Ernö ; Soma, Mitsuyuki ; Tanaka, Atsushi. / Surface chemistry and potential response of copper sulfide based ion-selective membrane in ligand solutions. In: Mikrochimica Acta. 1990 ; Vol. 100, No. 3-4. pp. 231-239.
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