DETERMINATION OF AS, CD, AND PB IN FEEDSTUFF BY GRAPHITE-FURNACE AAS

• Tipo: Artigo em Revista Científica Internacional
• Data: 1995

Autores

SOARES, ME (Autor) Outra; BASTOS, ML (Autor) FFUP; CARVALHO, F (Autor) FFUP; FERREIRA, M (Autor) Outra

Revista

Título: Atomic Spectroscopy

Vol. 16

Páginas: 149-153

ISSN: 0195-5373

Editora: Perkin-Elmer Corp.

Indexação

ISI Web of Knowledge - 11 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-001-GN3

Abstract (EN): A method is described for the determination of arsenic, cadmium, and lead in feedstuff using graphite furnace atomic absorption spectrometry (GFAAS) with stabilized temperature platform furnace conditions. An acid digestion of the samples at controlled temperature was required prior to analysis. The absorbance readings of the acid digests were made after adding an appropriate chemical modifier. The determinations in the acid digests were performed in the linear range from 0.5-150 mu g/L for As, 0.04-2.0 mu g/L for Cd, and 1.1-75 mu g/L for Pb. The validity of the method was verified by the standard additions method and by comparison of the results with certified reference material (Brown Bread CRM No. 191). The precision obtained was better than 14.5, 10.2, and 10.3 for As, Cd, and Pb, respectively. The mean levels (mg/kg) obtained for As, Cd, and Pb in 73 feedstuff samples were 1.57 (0.52-3.01), 0.16 (0.04-0.86), and 0.65 (0.02-2.52), respectively.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5