A square-wave voltammetric method for analysing the colour marker quinizarine in petrol and diesel fuels

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade Federal de Mato Grosso do Sul (UFMS)
dc.date.accessioned2014-05-20T15:23:48Z
dc.date.available2014-05-20T15:23:48Z
dc.date.created2014-05-20T15:23:48Z
dc.date.issued2007-01-01
dc.identifierDyes and Pigments. Oxford: Elsevier B.V., v. 74, n. 3, p. 566-571, 2007.
dc.identifier0143-7208
dc.identifierhttp://hdl.handle.net/11449/34499
dc.identifier10.1016/j.dyepig.2006.03.020
dc.identifierWOS:000245414600011
dc.identifier0000-0002-2296-1393
dc.description.abstractThis work presents an electroanalytical method based on square-wave voltammetry (SWV) for the determination of quinizarine (QNZ) in a mixture of Britton-Robinson buffer 0.08 mol L-1 with 30% of acetonitrile. The QNZ was oxidized at glassy carbon electrode in and the well-defined peak at +0.45 V vs. Ag/AgCl can be used for its determination as colour marker in fuel samples. All parameters were optimized and analytical curves can be constructed for QNZ concentrations ranging from 2.0 x 10(-6) mol L-1 to 1.4 x 10(-5) mol L-1, using f = 60 Hz and E-sw = 25 mV. The method offers a limit detection of 4.12 x 10(-7) mol L-1 and a standard deviation of 4.5% when six measurements of 1.25 x 10(-5) mol L-1 are compared. The method was successfully applied for determining QNZ in gasoline and diesel oil and the obtained results showed good agreement with those reported previously. (c) 2006 Elsevier Ltd. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationDyes and Pigments
dc.relation3.767
dc.relation0,819
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectquinizarine
dc.subjectmarker
dc.subjectfuels
dc.subjectelectroanalytical method
dc.titleA square-wave voltammetric method for analysing the colour marker quinizarine in petrol and diesel fuels
dc.typeArtículos de revistas


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