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Novel Amperometric Sensor Based on Rigid Near‐Percolation Composite
Author(s) -
OlivéMonllau Rosa,
Baeza Mireia,
Bartrolí Jordi,
Céspedes Francisco
Publication year - 2009
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.200804494
Subject(s) - amperometry , reproducibility , repeatability , materials science , composite number , percolation (cognitive psychology) , percolation threshold , analytical chemistry (journal) , sensitivity (control systems) , transducer , graphite , signal (programming language) , fabrication , chlorine , composite material , electrochemistry , electrode , chemistry , chromatography , electronic engineering , acoustics , computer science , electrical resistivity and conductivity , electrical engineering , physics , alternative medicine , pathology , engineering , biology , metallurgy , programming language , medicine , neuroscience
A novel amperometric sensor based on a rigid graphite‐epoxy composite of which composition is near to the percolation is reported. The electrochemical response of the novel transducer material was evaluated in terms of reproducibility of the fabrication process and reproducibility and repeatability of the analytical signal. The signal to noise ratio was improved. atomic force microscopy (AFM) technique was used to obtain qualitatively information. Amperometric detection of chlorine in water was carried on at a set potential of −250 mV vs. Ag/AgCl. The developed flow injection analysis (FIA) system responded linearly to chlorine concentration between 0.15 mg L −1 and 4 mg L −1 with a sensitivity of −0.20 μA L mg −1 . The proposed system was applied to real samples from swimming‐pool water. No significant difference was observed regarding the standard method.