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Rapid coulometry with a porous carbon felt electrode using iodide or ferrocyanide ion mediators
Author(s) -
Uchiyama Shunichi,
Suzuki Shuichi,
Hamamoto Osamu
Publication year - 1989
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.1140010407
Subject(s) - coulometry , iodate , electrolyte , iodide , chlorine , oxidizing agent , chemistry , ferrocyanide , inorganic chemistry , carbon fibers , ion , electrode , analytical chemistry (journal) , electrochemistry , chromatography , materials science , organic chemistry , composite material , composite number
The oxidizing agents of iodide and ferrocyanide ions, such as 1,4‐benzoquinone and the iodate ion have been determined by rapid (9–25 seconds) coulometry. The electrolytic solution is confined to the pores of the carbon felt electrode and the sample is added to the carbon felt surface, which is maintained at a fixed potential. Current efficiencies approached 100% for sample concentrations ranging from 1 × 10 −5 to 1 × 10 −1 M with relative standard deviation of 0.6–2.2%. The determination of residual chlorine in drinking water has been carried out using the same coulometric cell, and the results obtained by the present method are in good agreement with those obtained by the orthotolidine method.