Studies on the potentiometric thallium(III)-selective carbon paste electrode and its possible applications.
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.
Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, Czech Republic.
K
K
Vytras
E
E
Khaled
J
J
Jezková
H N
HN
Hassan
B N
BN
Barsoum
D002138:Calibration; D004566:Electrodes; D004787:Environmental Pollution / Q000032:analysis; D011199:Potentiometry / Q000295:instrumentation / Q000379:methods; D013793:Thallium / Q000032:analysis*
D013793:Thallium