Electrochemical Detection of TNT by Differential Pulse Adsorptive Stripping Voltammetry at Carbon Paste Electrode Modified by 1-Butyl-3-methylimidazolium Tetrafluoroborate

Different kinds of materials for electrodes based on glassy carbon, carbon fibers, and modified by an ionic liquid (BMIMBF4 ) were used to determine 2,4,6‐trinitrotoluene (TNT) in water environment by differential pulse adsorptive stripping voltammetry. The modified electrode based on BMIMBF4 showed...

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Bibliographic Details
Published in:Bulletin of the Korean Chemical Society 2016, 37(3), , pp.378-385
Main Authors: Vu, Ha Thi Thu, Le, Hanh Thi Vinh, Pham, Yen Thi Hai, Le, Hung Quoc, Pham, Phong Hong
Format: Article
Language:English
Subjects:
Electrode materials
Ionic liquids
Modified electrode
Stripping voltametry
Trinitrotoluene detection
화학
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Summary:Different kinds of materials for electrodes based on glassy carbon, carbon fibers, and modified by an ionic liquid (BMIMBF4 ) were used to determine 2,4,6‐trinitrotoluene (TNT) in water environment by differential pulse adsorptive stripping voltammetry. The modified electrode based on BMIMBF4 showed a better performance than those based on the microelectrode and glassy carbon electrode (GCE) in term of sensitivity. The best performance was obtained with the ionic liquid‐modified electrode with 80:10:10 (w/w/w) of the graphite powder/paraffin oil/BMIMBF4 composition in PBS, pH 8. The TNT concentration was linear in the range 1.5 to ~30 ppm for all studied electrodes (r = 0.9978) with a detection limit of 88.6 ppb using IL‐CPE (ionic liquid‐modified carbon paste electrode). This latter electrode was used to measure real samples taken from Red River, Vietnam. The recovery study for TNT in natural samples gave values from 99.7% to 103.3%. IL‐CPE demonstrated long‐term stability and reproducibility, with a relative standard deviation of 1.67%.
ISSN:1229-5949
0253-2964
1229-5949
DOI:10.1002/bkcs.10691