Vytras K, Khaled E, Jezková J, Hassan HN, Barsoum BN. Studies on the potentiometric thallium(III)-selective carbon paste electrode and its possible applications.
Fresenius J Anal Chem 2000;
367:203-7. [PMID:
11225884 DOI:
10.1007/s002160051625]
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Abstract
Construction, performance characteristics and applications of a carbon paste thallium(III) ion-selective electrode are described. The electrode, which is based on ion-associate compounds formed between cetylpyridinium and chlorothallate(III) complexes dissolved in tricresyl phosphate as pasting liquid, showed near-Nernstian response over the concentration range of 5.8 x 10(-6) - 2.9 x 10(-3) mol/L. Potentiometric titrations of thallium(III) with cetylpyridinium chloride were affected by higher concentrations of excess halides, probably due to the formation of higher halogenothallates.
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