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Disposable Electrochemical Sensor for Rapid Determination of Ethyl Xanthate in the Mining Industry
Author(s) -
Pedre Ignacio,
Battaglini Fernando,
González Graciela 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.201800419
Subject(s) - xanthate , reagent , quartz crystal microbalance , chemistry , dielectric spectroscopy , cyclic voltammetry , adsorption , electrochemistry , electron transfer , sulfide , voltammetry , inorganic chemistry , electrode , organic chemistry
Xanthate is a widely used reagent in sulfide mineral flotation. A simple and reliable method is presented for the direct monitoring of xanthate in flotation baths and their effluents, as a tool for their reconditioning, and reducing their environmental impact. For this purpose, screen‐printed graphite electrodes (SPE) were modified with a polyelectrolyte‐surfactant matrix which was able to adsorb the xanthate, whose concentration is determined by electrochemical impedance spectroscopy (EIS) following the change in the electron transfer resistance of ferrocyanide after a pre‐oxidation treatment. Linear ranges from 0.25 to 1 μM and 15 to 100 μM were determined for effluents and flotation baths, respectively. A mechanism for the electron transfer process is proposed based on Quartz crystal microbalance, IR and cyclic voltammetry studies.