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Silica‐modified Electrodes for Electrochemical Detection of Malachite Green
Author(s) -
Sacara Ana Maria,
Nairi Valentina,
Salis Andrea,
Turdean Graziella Liana,
Muresan Liana Maria
Publication year - 2017
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.201700400
Subject(s) - detection limit , electrode , malachite green , nafion , materials science , mesoporous silica , electrochemistry , working electrode , chemical engineering , nuclear chemistry , chromatography , chemistry , mesoporous material , adsorption , catalysis , organic chemistry , engineering
New silica‐modified glassy carbon electrodes prepared with three different sorts of ordered mesoporous silica (OMS) were characterized and tested for the electrochemical detection of Malachite Green (MG). The electrodes were prepared by drop casting using silica suspensions and, for stability sake, a Nafion coating was deposited on the electrode top by the same technique. Square wave anodic stripping voltammetry was used to investigate the effect of various experimental parameters (deposition time, solution pH, silica type and concentration) on the performance of the modified electrodes. The best electrode (GC/MCM‐41‐NH 2 /Nafion) with detection limit 0.36 μM, sensitivity 0.164±0.003 A/M; linear domain 1–6 μM was applied to detect MG in a commercial product commonly used as biocide in aquaria for ornamental fish.