Voltammetric Study of the Transfer of Heavy Metal Ions at Nitrobenzene/Water Interface Assisted by 1,4,7,10,13,16-Hexathiacyclooctadecane.

• KATANO Hajime

  Department of Bioscience, Fukui Prefectural University

• SENDA Mitsugi

  Department of Bioscience, Fukui Prefectural University

Abstract

The transfer of Cd²⁺, Pb²⁺, Hg²⁺, Pd²⁺, and Cu²⁺ ions across polarized nitrobenzene/water (NB/W) interface assisted by 1,4,7,10,13,16-hexathiacyclooctadecane (HTCO) present in NB-phase has been studied by means of cyclic voltammetry. Voltammograms of Cd²⁺ and Pb²⁺ ions can be interpreted as being due to the reversible transfer of the ions assisted by the formation of 1:1 metal(M)-HTCO complex in NB-phase. The formal formation constants of [PbHTCO]²⁺ and [CdHTCO]²⁺ complexes in NB-phase have been determined to be 10^11.7±0.3 and 10^7.9±0.3 M^-1, respectively, using the formal potentials of non-assisted ion(M)-transfer at NB/W interface (Δ^W_NB φ^0′_M). The Δ^W_NB φ^0′_M’s of Cd²⁺ and Pb²⁺ ions and Zn²⁺ and Tl⁺ ions as well have been determined on the basis of the tetraphenylarsonium-tetraphenylborate assumption and of the polarographic reversible half-wave potentials of the ions in NB- and W-media reported by previous authors. Voltammograms of Hg²⁺ and Pd²⁺ ions have been explained by that 1:1 M-HTCO complex is formed and soluble in both NB- and W-phases. The formal potentials of the transfer of [HgHTCO]²⁺ and [PdHTCO]²⁺ complex ions at NB/W interface have been determined. Voltammograms of Cu²⁺ ion are of irreversible nature.

Journal

• Analytical Sciences

  Analytical Sciences 15 (12), 1179-1184, 1999

  The Japan Society for Analytical Chemistry

Keywords

• Analytical Chemistry

Details

• CRID: 1390282679233117440
• NII Article ID: 130004440000
• NII Article ID: 10004708578
• NII Book ID: AA10500785
• DOI: 10.2116/analsci.15.1179
• COI: 1:CAS:528:DyaK1MXotFSktb4%3D
• ISSN: 13482246
• ISSN: 09106340
• NDL BIB ID: 4952659
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4952659
• Web Site: https://link.springer.com/content/pdf/10.2116/analsci.15.1179.pdf
• Web Site: https://link.springer.com/article/10.2116/analsci.15.1179/fulltext.html
• Web Site: http://www.jstage.jst.go.jp/article/analsci/15/12/15_12_1179/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed