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Crown ethers in stripping voltammetry of palladium
Author(s) -
Tsymbal Maria V.,
Tuijan Iva Ya.,
Temerdashev Zaual A.,
Brainina Khjena Z.
Publication year - 1994
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140060207
Subject(s) - palladium , anodic stripping voltammetry , graphite , crown ether , adsorption , electrode , chemistry , voltammetry , stripping (fiber) , cyclic voltammetry , inorganic chemistry , analytical chemistry (journal) , materials science , electrochemistry , organic chemistry , ion , catalysis , composite material
The similarity in the structures (presence of hexatomic rings) of crown ethers and graphite is used for adsorptive modification of the graphite electrode surface. The effect is exploited in stripping voltammetry for the determination of palladium. Anodic currents observed at potentials of 0.6 to 0.65 V (vs. Ag/AgCI electrode) are the source of information about adsorption of the crown ethers. Maximum adsorption of the reagents takes place at potentials close to the potential of zero charge of graphite. Deposition of palladium on the electrode surface is enhanced, the closer the values of the diameters of the crown‐ether rings and Pd(II) are.