Abstract
AbstractThis 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.
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