University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Electrode

Classification: Electrode -> ion selective -> cerium

Citations 1

"Rare-earth Ion-selective Electrodes"
Electroanalysis 1993 Volume 5, Issue 9-10 Pages 863-867

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Yonghua Zhang, Jinlan Wu, Erkang Wang

Abstract: Copolymers obtained by radiation grafting of high-density polyethylene, polypropene, PVC, polystyrene or polyacrylonitrile with acrylic acid were treated with a solution of rare-earth chloride by IR heating for 18 h, and the resulting materials were heat-pressed to form membranes for use in ISE. Membranes incorporating Gd, Pr, Nd or Yb, used at the optimum pH of 4.5-6.5, 5.5-6.4, 5.5 and 5.5-6.5, respectively, had corresponding linear response ranges of 0.002-10 mM, 0.5-100 mM, 0.002-10 mM and The membranes could be used in a flow-through cell detector for FIA. The selectivity coefficients for a Gd-selective electrode are tabulated. Electrodes were also prepared from ignited rare-earth oxides; e.g., 50-56% of cerium oxide was mixed with epoxy-resin and carboxy-terminated butadiene-acrylonitrile copolymer to form a Ce electrode for the range 10 µM-0.1 M Ce3+, -La3+, -Nd3+, -Pr3+ or -Sm3+. Electrodes based on lanthanum oxide or Dy2O3 were also prepared. Chelates of Nd with 4-benzoyl-3-methyl-1-phenylpyrazolin-5-one, Yb with 2-ethylhexyl 2-ethylhexylphosphate and Sm(NO3)3 with TBP were used to prepare Nd, Yb and Sm electrodes, respectively.
Praseodymium Neodymium Ytterbium Gadolinium Selectivity Detector