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Electrochemical Reduction of Ge(IV) Catalyzed by o ‐Catechol at the Dropping Mercury Electrode and at the Hanging Mercury Drop Electrode after Adsorptive Preconcentration
Author(s) -
Muñiz Álvarez Jesús L.,
García Calzón Josefa A.,
López Fonseca Juan M
Publication year - 1999
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/(sici)1521-4109(199907)11:9<656::aid-elan656>3.0.co;2-n
Subject(s) - polarography , hanging mercury drop electrode , dropping mercury electrode , catechol , chemistry , mercury (programming language) , electrode , adsorption , drop (telecommunication) , inorganic chemistry , electrochemistry , catalysis , cyclic voltammetry , voltammetry , analytical chemistry (journal) , chromatography , organic chemistry , telecommunications , computer science , programming language
At low o ‐catechol concentrations, the behavior of the Ge(IV)‐ o ‐catechol electrocatalytic system differs significantly (particularly in its dependence on pH) when examined by DC polarography or by cyclic and square wave voltammetry following adsorptive preconcentration. This difference is ascribed to the fact that the catalytic complex is formed by a preceding chemical reaction and/or by direct adsorption when a hanging mercury drop electrode with an accumulation period is used whereas it is exclusively yielded by the first pathway when using a dropping mercury electrode.