期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 138, 期 1, 页码 257-263出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.01.043
关键词
Fuel marker; Solvent Blue 14; Screen-printed carbon electrode; Voltammetric method; Surfactant in electrochemistry
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [05/00382-4]
- CAPES
- CNPq
A voltammetric method was developed to detect Solvent Blue 14 (SB-14) dye marker in fuel ethanol and kerosene samples. The device is based on a screen-printed carbon electrode (SPCE) operating in a Brition-Robinson buffer with N,N-dimethylformamide (7:3, v/v) and 5.50 x 10(-4) mol L-1 of Dioctyl sulfosuccinate sodium (DSS) where the anthraquinone group of the dye is reduced at -0.40V. The peak intensity is triplicated in the presence of the surfactant, which forms a charged film on the electrode surface acting as an anti-fouling agent. Using the best experimental conditions, the electroanalytical method presents a linear response for 2.00 x 10(-7) to 2.00 x 10(-6) mol L-1 SB-14 dye (r=0.9986) and a detection limit of 9.30 x 10(-8) mol L-1. The developed method was successfully utilized for the quantification of SB-14 dye in alcohol samples Without any pre-treatment and in kerosene (after rapid clean-up procedure) with recoveries of 82.00-99.00%, respectively. The values are in good accordance with other reference methods based on spectrophotometric analysis. (C) 2009 Elsevier B.V. All rights reserved.
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