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Development of a Chloride Ion‐Selective Solid State Sensor Based on Doped Polypyrrole‐Graphite‐Epoxy Composite
Author(s) -
ÁlvarezRomero G. A.,
RamírezSilva M. T.,
GalánVidal C. A.,
PáezHernández M. E.,
RomeroRomo M. A.
Publication year - 2010
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.200900601
Subject(s) - polypyrrole , graphite , epoxy , materials science , selectivity , composite number , chloride , potentiometric titration , doping , detection limit , ion , nuclear chemistry , chemical engineering , inorganic chemistry , analytical chemistry (journal) , composite material , chemistry , chromatography , polymer , catalysis , organic chemistry , metallurgy , polymerization , optoelectronics , engineering
This paper reports the development and characterization of a solid state potentiometric sensor for chloride ions, based on doped polypyrrole‐graphite‐epoxy composite. The optimum mixture proportion found for polypyrrole:graphite was 60 : 40 meanwhile a 50 : 50 proportion was used for the polypyrrol+graphite:epoxy mixture. The stabilization time was approximately 16 min, while the response times varied within 2 and 23 s. The sensor displayed a sensitivity of 58 mV/decade [Cl − ], and 3×10 −6 M detection limit. The selectivity coefficients showed a greater selectivity to that reported for commercial‐type sensors. The statistical analysis for chlorides' determination in commercial saline serums did not show significant differences respect to data reported by the manufacturers.