Simultaneous determination of chromium and nickel in medicinal plants by slurry sampling graphite furnace atomic absorption spectrometry

Página do item simplificado
dc.contributor.authorFortunato, Felipe Manfroi [UNESP]
dc.contributor.authorMiranda, Kelber dos Anjos de [UNESP]
dc.contributor.authorGomes Neto, José Anchieta [UNESP]
dc.contributor.authorFreschi, Gian Paulo Giovanni
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de Alfenas (UNIFAL)
dc.date.accessioned2015-05-15T13:30:21Z
dc.date.available2015-05-15T13:30:21Z
dc.date.issued2013
dc.description.abstractSlurry sampling graphite furnace atomic absorption spectrometry was employed for the simultaneous determination of Cr and Ni in medicinal plants. A chemical modifi er was not required and the optimum pyrolysis and atomization temperatures were 1600 °C and 2300 °C, respectively. Calibration using aqueous standards allowed accurate and precise results. Characteristic masses for Cr and Ni were 5.8 and 31 pg, respectively. The limits of detection obtained were 0.04 μg g−1 for Cr and 0.3 μg g−1 for Ni using 0.5% (m/v) slurries (100 mg/20 mL). Relative standard deviations of 3 measurements for Cr and Ni in medicinal plant slurries were below 10%. Accuracy was evaluated after analyzing the standard reference materials Tomato Leaves (1573a), Apple Leaves (1515), Pine Needles (1575a) and Peach Leaves (1547). The results obtained were in agreement with certifi ed values at a 95% confi dence level (unpaired t-test). The proposed method was applied to slurries of ten medicinal plant samples and the concentrations varied from 1.76 to 11.6 μg g-1 for Cr and from 1.2 to 5.5 μg g-1 for Ni. The lifetime of the graphite atomizer was around 600 fi rings.en
dc.description.affiliationUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Química Analítica, Instituto de Química de Araraquara, Araraquara, Rua Prof. Francisco Degni, 55, Quitandinha, CEP 14801970, SP, Brasil
dc.description.affiliationUnespUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Química Analítica, Instituto de Química de Araraquara
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2009/52480-0
dc.format.extent436-440
dc.identifierhttp://www.brjac.com.br/download.php
dc.identifier.citationBrazilian Journal of Analytical Chemistry - BrJAC, v. 3, n. 10, p. 436-440, 2013.
dc.identifier.issn2179-3425
dc.identifier.lattes7759622872412835
dc.identifier.lattes8708735699846578
dc.identifier.urihttp://hdl.handle.net/11449/123526
dc.language.isoeng
dc.relation.ispartofBrazilian Journal of Analytical Chemistry - BrJAC
dc.relation.ispartofsjr0,138
dc.rights.accessRightsAcesso restrito
dc.sourceCurrículo Lattes
dc.subjectCrômiopt
dc.subjectNíquelpt
dc.subjectplantas medicinaispt
dc.subjectSuspensãopt
dc.subjectGF AASpt
dc.subjectChromiumen
dc.subjectNickelen
dc.subjectMedicinal plantsen
dc.subjectSlurry samplingen
dc.subjectGraphite furnace atomic absorption spectrometryen
dc.titleSimultaneous determination of chromium and nickel in medicinal plants by slurry sampling graphite furnace atomic absorption spectrometryen
dc.typeArtigo
unesp.author.lattes7759622872412835
unesp.author.lattes8708735699846578
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt
unesp.departmentQuímica Analíticapt

Arquivos

Coleções

Artigos - Química Analítica - IQ