Organic tin compounds combined with anionic additives - An ionophore system leading to a phosphate ion-selective electrode?

S. Sasaki, S. Ozawa, D. Citterio, K. Yamada, K. Suzuki

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The potentiometric response characteristics of electrodes based on organic trialkyl/aryl-tin compounds combined with various amounts of anionic additive (NaTFPB) were investigated in 0.1M bis-Tris-H2SO4 buffer solution at pH 7.0. The best result for phosphate sensing was obtained for the electrode membrane containing tributyltin chloride and 25mol% NaTFPB, where the electrode exhibits high selectivity towards phosphate anions with a slope of -60mV per decade. It was demonstrated that the interference from more lipophilic anions is drastically suppressed (logKij pot, i=H 2PO4 -: salicylate, 0.5; SCN-, -0.8; ClO4 -, -2.3) under this optimized measurement conditions.

Original languageEnglish
Pages (from-to)131-134
Number of pages4
JournalTalanta
Volume63
Issue number1
DOIs
Publication statusPublished - 2004 May 10

Keywords

  • Ion-selective electrode
  • Organic tin
  • Phosphate
  • Sensor

ASJC Scopus subject areas

  • Analytical Chemistry

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