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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.)

Antioxidants detection in aviation biokerosene by high-performance liquid chromatography using gold nanoparticles anchored in reduced graphene oxide

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Delfino, Jose R. [1] ; da Silva, Jose Luiz [1] ; Marques, Aldalea L. B. [2] ; Stradiotto, Nelson R. [1, 3, 4]
Total Authors: 4
[1] Sao Paulo State Univ, Chem Inst, UNESP, Araraquara, SP - Brazil
[2] Fed Univ Maranhao UFMA, Dept Chem Technol, Sao Luis, MA - Brazil
[3] Sao Paulo State Univ, Bioenergy Res Inst, UNESP, Rio Claro, SP - Brazil
[4] Fluminense Fed Univ UFF, Sch Ind & Met Engn, Volta Redonda, RJ - Brazil
Total Affiliations: 4
Document type: Journal article
Source: FUEL; v. 260, JAN 15 2020.
Web of Science Citations: 0

This paper report the development of a new HPLC-pulsed amperometric detector (HPLC-PAD) for the determination of antioxidants using glass carbon electrode (GCE) modified with reduced graphene oxide (rGO) and gold nanoparticles (AuNPs). The modified electrode exhibited efficient electro-oxidation when it was applied in the analysis of three important antioxidants: N, N'-di-sec-butyl paraphenylenediamine (BPA), 2,6-Di-tert-butyl-phenol (TBP) and 2,6-Di-tert-butyl-4-methylphenol (BHT). The chromatographic separation was performed with an isocratic elution composed of acetonitrile/water (90:10% v/v) and 1% acetic acid. The chromatograms showed good separation of all components in periods of time less than 10 min. The developed method presented linear ranges of 5.0 x 10(-6 )-1.3 x 10(-4) mol L-1 (BPA), 2.5 x 10(-6) -1.0 x 10(-4) mol L-1 (TBP) and 7.5 x 10(-7) -1.3 x 10(-4) mol L-1 (BHT), and the analytical curves presented limits of detection of 1.2 x 10(-7), 1.7 x 10(-7) and 7.8 x 10(-8) mol L-1 for BPA, TBP and BHT, respectively. The values obtained for the recovery studies conducted ranged from 97.3 +/- 1.5% to 101.5 +/- 2.1%. The results showed that the method is reliable, since it presented high sensitivity, precision and accuracy. The developed method was successfully applied for the determination of antioxidants in a sample of biokerosene, consisting of isoparaffins synthesized from fermented and hydroprocessed sugars. The determined concentrations were TBP 3.1 x 10(-5) +/- 5.5 x 10(-6) mol L-1 and BHT 3.3 x 10(-5) +/- 2.9 x 10(-6) mol L-1. (AU)

Grantee:Nelson Ramos Stradiotto
Support type: Regular Research Grants