Bismuth as a general internal standard for lead in atomic absorption spectrometry

Autor(es)

Bechlin, Marcos A. ^[1] ; Fortunato, Felipe M. ^[1] ; Ferreira, Edilene C. ^[1] ; Gomes Neto, Jose A. ^[1] ; Nobrega, Joaquim A. ^[2] ; Donati, George L. ^[3] ; Jones, Bradley T. ^[3]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, UNESP, Dept Analyt Chem, BR-14801970 Araraquara, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[3] Wake Forest Univ, Dept Chem, Winston Salem, NC 27106 - USA

• Tipo de documento: Artigo Científico
• Fonte: Analytica Chimica Acta; v. 831, p. 24-30, JUN 11 2014.
• Citações Web of Science: 10

Resumo

Bismuth was evaluated as internal standard for Pb determination by line source flame atomic absorption spectrometry (LS FAAS), high-resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS) and line source graphite furnace atomic absorption spectrometry (LS GFAAS). Analysis of samples containing different matrices indicated close relationship between Pb and Bi absorbances. Correlation coefficients of calibration curves built up by plotting A(Pb)/A(Bi) versus Pb concentration were higher than 0.9953 (FAAS) and higher than 0.9993 (GFAAS). Recoveries of Pb improved from 52-118% (without IS) to 97-109% (IS, LS FAAS); 74-231% (without IS) to 96-109% (IS, HR-CS FAAS); and 36-125% (without IS) to 96-110% (IS, LS GFAAS). The relative standard deviations (n = 12) were reduced from 0.6-9.2% (without IS) to 0.3-4.3% (IS, LS FAAS); 0.7-7.7% (without IS) to 0.1-4.0% (IS, HR-CS FAAS); and 2.1-13% (without IS) to 0.4-5.9% (IS, LS GFAAS). (C) 2014 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 12/13500-9 - Avaliação do bismuto como padrão interno para chumbo em técnicas espectrométricas
• Beneficiário: José Anchieta Gomes Neto
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/23323-7 - Método de adição de padrão interno por gradiente de concentração em fluxo em técnicas espectroscópicas
• Beneficiário: Felipe Manfroi Fortunato
• Modalidade de apoio: Bolsas no Brasil - Doutorado