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Application of a Polypyrrole/Carboxy Methyl Cellulose Ion Imprinted Polymer in the Electrochemical Detection of Mercury in Water
Author(s) -
Velempini Tarisai,
Pillay Kriveshini,
Mbianda Xavier Y.,
Arotiba Omotayo A.
Publication year - 2018
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.201800445
Subject(s) - polypyrrole , detection limit , fourier transform infrared spectroscopy , polymer , materials science , supporting electrolyte , electrochemical gas sensor , electrochemistry , anodic stripping voltammetry , analytical chemistry (journal) , nuclear chemistry , chemistry , polymerization , electrode , inorganic chemistry , chemical engineering , chromatography , engineering , composite material
Sulphur containing carboxy methyl ion imprinted polymers (S‐IIPs) were applied as an electrode modifier for the electrochemical detection of Hg(II). A bare glassy carbon electrode (GCE) was modified by electro‐polymerizing a layer of pyrrole and then drop coating with S‐IIPs. The bare GCE, GCE/polypyrrole (GCE/PPy), GCE/polyprrole/non‐ion imprinted polymers (GCE/PPy/NIPs) and the GCE/polypyrrole/sulphur ion imprinted polymers (GCE/PPy/S‐IIPs) electrodes were characterised with Fourier Transmission Infrared (FTIR) and electrochemical impendence spectroscopy (EIS). The square wave anodic stripping voltammetry (SWASV) optimised conditions for the GCE/PPy/S‐IIPs were: a pH of 3, deposition potential of −1.0 V, pre‐concentration time of 60 s and 0.1 M HCl supporting electrolyte. The developed ion imprinted polymer electrochemical sensor was applied in the detection of Hg(II) in water. A detection limit of 0.1 μg L −1 was calculated within a concentration range of 20–800 μg L −1 . The sensor was selective in the presence of interfering ions and method was validated with inductively coupled plasma‐optical emission spectrometry (ICP‐OES) using real water and standard water samples.