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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Enhancement of voltammetric determination of quinizarine based on the adsorption at surfactant-adsorbed-layer in disposable electrodes

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Author(s):
Goncalves Trindade, Magno Aparecido [1] ; Bilibio, Uendinara [1] ; Boldrin Zanoni, Maria Valnice [2]
Total Authors: 3
Affiliation:
[1] Fed Univ Grande Dourados, Fac Sci & Technol, BR-79804970 Dourados, MS - Brazil
[2] Sao Paulo State Univ UNESP, Dept Analyt Chem, Inst Chem, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: FUEL; v. 136, p. 201-207, NOV 15 2014.
Web of Science Citations: 11
Abstract

Screen-printed carbon electrode (SPCE) surface was easily altered through spontaneous hydrophobic interactions with cationic surfactant cetyltrimethylammonium bromide (CTAB) to form a surfactant-adsorbed-layer. This finding combined the practicality of the SPCE with the CTAB's anti-fouling ability and preconcentration properties as a suitable alternative to determine the quinizarine in fuel samples using the square-wave voltammetric technique. Under optimized experimental conditions the electroanalytical method presented a linear response from 5.00 x 10(-7) to 6.00 x 10(-6) mol L-1 (r = 0.998) with a detection limit of 2.70 x 10(-7) mol L-1. The methodology was successfully applied in the dye marker quantification in diesel oil and kerosene samples, without matrix interference, with recoveries values highly satisfactory and ranged between 84.0% and 98.7%. (C) 2014 Elsevier Ltd. All rights reserved. (AU)