Determination of zinc in lubricating oil by flame AAS employing ultrasonic extraction

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorSábio, Rafael Miguel-
Autor(es): dc.creatorOliveira, Silvana Ruella-
Autor(es): dc.creatorTognolli, João Olimpio-
Autor(es): dc.creatorNeto, José Anchieta Gomes-
Data de aceite: dc.date.accessioned2025-08-21T20:57:36Z-
Data de disponibilização: dc.date.available2025-08-21T20:57:36Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2011-11-01-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/226607-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/226607-
Descrição: dc.descriptionThe 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 H2O 2, 120 seconds sonication time, 60 °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 μg L-1.-
Descrição: dc.descriptionUNESP-Univ. Estadual Paulista Institute of Chemistry Analytical Chemistry Department, Rua Prof. Francisco Degni, s/n, CEP 14801-970, Araraquara - SP-
Descrição: dc.descriptionUNESP-Univ. Estadual Paulista Institute of Chemistry Analytical Chemistry Department, Rua Prof. Francisco Degni, s/n, CEP 14801-970, Araraquara - SP-
Formato: dc.format240-245-
Idioma: dc.languageen-
Relação: dc.relationAtomic Spectroscopy-
???dc.source???: dc.sourceScopus-
Título: dc.titleDetermination of zinc in lubricating oil by flame AAS employing ultrasonic extraction-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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