Electrothermal AAS determination of Ni in soft drinks using Co as the internal standard

Página do item simplificado
dc.contributor.authorDe Oliveira, Adriana Paiva [UNESP]
dc.contributor.authorGomes Neto, José Anchieta [UNESP]
dc.contributor.authorNóbrega, Joaquim A.
dc.contributor.authorOliveira, Pedro Vitoriano
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2022-04-28T20:01:16Z
dc.date.available2022-04-28T20:01:16Z
dc.date.issued2005-07-01
dc.description.abstractA method for the direct determination of Ni in soft drinks by graphite furnace atomic absorption spectrometry using a transversely heated graphite atomizer (THGA), Zeeman-effect background corrector, and Co as the internal standard (IS) is proposed. Magnesium nitrate was used to stabilize both Ni and Co. All diluted samples (1+1) in 0.2% (v/v) HNO3 and reference solutions [5.0-50 μg L-1 Ni in 0.2% (v/v) HNO3] were spiked with 50 μg L-1 Co. For a 20-μL, sample dispensed into the atomizer, correlations between the ratio of absorbance of Ni to absorbance of Co and the analyte concentration were close to 0.9996. The relative standard deviation of the measurements varied from 0.5 to 3.4% and 1.0 to 7.0% (n=12) with and without IS, respectively. Recoveries within 98-104% for Ni spikes were obtained using IS. The characteristic mass was calculated as 43 pg Ni and the limit of detection was 1.4 μg L-1. The accuracy of the method was checked for the direct determination of Ni in soft drinks and the results obtained with IS were better than those without IS.en
dc.description.affiliationDepartamento de Química Analítica Universidade Estadual Paulista, 14801-970, PO Box 355, Araraquara-SP
dc.description.affiliationDepartamento de Química Universidade Federal de São Carlos, 13560-970, PO Box 676, São Carlos-SP
dc.description.affiliationInstituto de Química Universidade de São Paulo, 05513-970, P.O. Box 26077, São Paulo-SP
dc.description.affiliationUnespDepartamento de Química Analítica Universidade Estadual Paulista, 14801-970, PO Box 355, Araraquara-SP
dc.format.extent158-161
dc.identifier.citationAtomic Spectroscopy, v. 26, n. 4, p. 158-161, 2005.
dc.identifier.issn0195-5373
dc.identifier.scopus2-s2.0-23844460879
dc.identifier.urihttp://hdl.handle.net/11449/224587
dc.language.isoeng
dc.relation.ispartofAtomic Spectroscopy
dc.sourceScopus
dc.titleElectrothermal AAS determination of Ni in soft drinks using Co as the internal standarden
dc.typeArtigo

Arquivos

Coleções

Artigos - Química Analítica - IQ