Determination of Zinc in Lubricating Oil by Flame MS Employing Ultrasonic Extraction

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dc.contributor.authorSabio, Rafael Miguel [UNESP]
dc.contributor.authorOliveira, Silvana Ruella [UNESP]
dc.contributor.authorTognolli, Joao Olimpio [UNESP]
dc.contributor.authorGomes Neto, José Anchieta [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T14:19:07Z
dc.date.available2014-05-20T14:19:07Z
dc.date.issued2011-11-01
dc.description.abstractThe determination of zinc in lubricating oils by line-source flame atomic absorption spectrometry (LS-FAAS) is proposed employing an alternative sample preparation procedure based on ultrasonic wave-assisted acid extraction. The chemometric optimization of the main parameters influencing the extraction provided the following conditions: 1.3 mL of HCl, 5.0 mL of H(2)O(2), 120 seconds sonication time, 60 degrees C heating temperature, and 45% sonication amplitude of the ultrasound probe. Analytical curves in the 0.5 - 4.0 mg L(-1) Zn range were consistently obtained (R = 0.9990). Commercial unused lubricating oil samples were analyzed by the proposed method and by high-resolution continuum source flame AAS (HR-CS FAAS) as the comparative technique. A paired t-test showed that the results between the two techniques were in agreement at the 95% confidence level. The accuracy of the proposed method was evaluated using an alternative sample preparation method based on recovery tests. Recoveries in the 92 - 119% interval were found. The relative standard deviation was 4% and the limit of detection was 17.6 mu g L(-1).en
dc.description.affiliationUNESP Univ Estadual Paulista, Inst Chem, Dept Analyt Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP Univ Estadual Paulista, Inst Chem, Dept Analyt Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdCNPq: 300600/2009-7
dc.format.extent240-245
dc.identifierhttp://www.lw20.com/1201301026164566.html
dc.identifier.citationAtomic Spectroscopy. Shelton: Perkin-elmer Corp, v. 32, n. 6, p. 240-245, 2011.
dc.identifier.issn0195-5373
dc.identifier.lattes8708735699846578
dc.identifier.urihttp://hdl.handle.net/11449/25761
dc.identifier.wosWOS:000298114900005
dc.language.isoeng
dc.publisherPerkin-elmer Corp
dc.relation.ispartofAtomic Spectroscopy
dc.relation.ispartofjcr1.123
dc.relation.ispartofsjr0,327
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleDetermination of Zinc in Lubricating Oil by Flame MS Employing Ultrasonic Extractionen
dc.typeArtigo
dcterms.rightsHolderPerkin-elmer Corp
unesp.author.lattes8708735699846578
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Química Analítica - IQ