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

研究成果: Article査読

24 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)131-134
ページ数4
ジャーナルTalanta
63
1
DOI
出版ステータスPublished - 2004 5 10

ASJC Scopus subject areas

  • 分析化学

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