• Bulletin of the Korean Chemical Society
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• 제24권4호
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• pp.421-425
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• 2003

A new thallium(Ⅰ) selective electrode based on dibenzylidaza-18-crown-6 as mambrane carrier was successfully prpared. The electrode exhibitis a near-Nernstian response for $ T1^+$ ions over a wide concentration range from $1.0×10^{15}-1.0×10^{-1}$M at 25℃, and was found to be selective, precise and useable within the pH range 4.0-11.0. The electrode was successfully used as an indicator electrode in potentiometric titration of thallium ions.

• Bulletin of the Korean Chemical Society
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• 제24권11호
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• pp.1585-1589
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• 2003

A PVC-based membrane electrode for thallium(I) ions based on 1,21,23,25-tetramethyl-2,20: 3,19-dimetheno-[H, 2] H, 23H, 25H-bis-[1,3] dioxocino[5,4-i:5',4'-i] benzo [1,2-d: 5.4-d'] bis [1,3] benzodioxocin(II) has been prepared. The electrode displays a linear dynamic range of $1.0{\times}10^{-1}-1.0{\times}10^{-5}$ M, with a Nernstian slope of $59.8{\pm}0.2\;mV\;{decad^-1}$, and a detection limit $5.0{\times}10^{-6}$ M. It has a very fast response time of<10 s and can be used for at least ten weeks without a considerable divergence in potentials. This electrode revealed comparatively good selectivity with respect to alkali, alkaline earth, and some transition and heavy metal ions and was effective in a pH range of 2.0-10.0. It was used as an indicator electrode in potentiometric titration of thallium ion with sulfide ion.