Implementation of AAS methods for the quantification of Hg and hexavalent Cr in recycled paper used for food packaging

• Tipo: Artigo em Revista Científica Internacional
• Data: 2002

Autores

Soares, ME (Autor) Outra; Carneiro, C (Autor) Outra; Bastos, ML (Autor) FFUP

Revista

Título: Atomic Spectroscopy

Vol. 23

Páginas: 148-153

ISSN: 0195-5373

Editora: Perkin-Elmer Corp.

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 4 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-000-N24

Abstract (EN): Total mercury and hexavalent chromium were determined in recycled paper samples and cardboard packages intended to come in contact with food using atomic absorption spectrometry (AAS). For the determination of mercury, the samples were digested with a mixture of concentrated HNO3 and H2O2 and determined by cold vapor generation. Hexavalent chromium was extracted directly from the paper and cardboard with a solution of NaOH and determined by electrothermal atomization AAS. The detection limits were 0.38 and 0.50 mug/L for mercury and hexavalent chromium, respectively. The determinations were performed in the linear range of 0.38-10.0.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6