Application of Thiacrown Ethers as Ligands for Lead-Selective Electrodes.

  • RADECKA Hanna
    Polish Academy of Sciences, Institute of Animal Reproduction and Food Research, Division of Food Science
  • RADECKI Jerzy
    Polish Academy of Sciences, Institute of Animal Reproduction and Food Research, Division of Food Science
  • DEHAEN Wim
    Department of Chemistry

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Abstract

Lead-selective solvent polymeric membrane electrodes based on selected thiacrown ethers, poly(vinyl chloride) (PVC), the plasticizer bis(2-ethylhexyl)phthalate [“dioctyl phthalate” (DOP)], and potassium tetrakis(p-chlorophenyl)borate (KTpCPB) (50mol%, relative to the ionophore) as anionic sites are described. The potential measurements were done in the presence of acetate buffer (pH 4.00) and for successively diluted stock solutions of 10-2 M Pb(NO3)2. Potential-pH profiles of membranes based on selected thiacrown ethers demonstrated lack of H+ interference within a wide pH range. The effect of the sample solution composition as well as the inner reference solution on the selectivity and detection range were demonstrated.

Journal

  • Analytical Sciences

    Analytical Sciences 15 (11), 1109-1114, 1999

    The Japan Society for Analytical Chemistry

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