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Solid‐Contact Potentiometric Sensor Based on Polyaniline and Unsubstituted Pillar[5]Arene
Author(s) -
Stoikova Ekaterina E.,
Sorvin Michail I.,
Shurpik Dmitry N.,
Budnikov Herman C.,
Stoikov Ivan I.,
Evtugyn Gennady A.
Publication year - 2015
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.201400494
Subject(s) - potentiometric titration , polyaniline , pillar , detection limit , potentiometric sensor , redox , ionophore , chemistry , electrode , metal ions in aqueous solution , electrochemistry , metal , inorganic chemistry , organic chemistry , polymer , polymerization , chromatography , structural engineering , engineering , calcium
A novel potentiometric sensor based on screen‐printed carbon electrode covered with electropolymerized polyaniline (PANI) and unsubstituted pillar[5]arene as ionophore has been developed and tested in potentiometric measurements of pH and metal ions. The introduction of pillar[5]arene improved the reversibility of the pH response in the range from 2.0 to 9.0 with the slope of 45 mV/pH. Among metal cations, the response to Fe 3+ and Ag + ions was referred to PANI redox conversion whereas the signal toward Cu 2+ in the range from 1.0×10 −6 to 1.0×10 −2 M (limit of detection ( LOD ) 3.0×10 −7 M) to specific interaction with the macrocycle.