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Amperometric Detection of 4‐Chlorophenol on Two Types of Expanded Graphite Based Composite Electrodes
Author(s) -
Pop Aniela,
Manea Florica,
Radovan Ciprian,
Malchev Plamen,
Bebeselea Adriana,
Proca Cristina,
Burtica Georgeta,
Picken Stephen,
Schoonman Joop
Publication year - 2008
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.200804348
Subject(s) - epoxy , electrode , detection limit , graphite , cyclic voltammetry , materials science , amperometry , composite number , electrochemistry , voltammetry , electrolyte , analytical chemistry (journal) , composite material , nuclear chemistry , chromatography , chemistry
The assessment of an expanded graphite‐Ag‐zeolite‐epoxy composite (EG‐Z‐Ag‐Epoxy) electrode for the determination of 4‐chlorophenol (4‐CP) is described and compared to the corresponding expanded graphite‐epoxy composite (EG‐Epoxy) electrode. Cyclic voltammetry was used to characterize the electrochemical behavior and determination of 4‐CP at both electrodes in 0.1 M Na 2 SO 4 and 0.1 M NaOH supporting electrolytes. A substantial enhancement of sensitivity for the determination of 4‐CP at the EG‐Z‐Ag‐Epoxy electrode was reached by applying a chemical preconcentration step prior to voltammetric quantification. Also, under these last conditions the lowest limit of detection of 1 μM illustrates the analytical versatility of this electrode in a concentration range where aquatic 4‐chlorophenol pollution is known to occur.