Metals determination in wines by sequential injection analysis with flame atomic absorption spectrometry

• Tipo: Artigo em Revista Científica Internacional
• Data: 2000

Autores

Costa, RCC (Autor) Outra; Cardoso, MI (Autor) Outra; Araujo, AN (Autor) FFUP

Revista

Título: American Journal of Enology and Viticulture

Vol. 51 Nº 2

Páginas: 131-136

ISSN: 0002-9254

Editora: American Society for Enology and Viticulture

Indexação

ISI Web of Knowledge - 16 Citações

Scopus - 18 Citações

Classificação Científica

FOS: Ciências agrárias > Outras ciências agrárias

Outras Informações

ID Authenticus: P-001-13K

DOI: 10.1016/s0003-2670(01)00845-5

Abstract (EN): This paper describes the application of sequential injection analysis with flame atomic absorption spectrophotometric detection (SIA/FAAS) for the determination of Zn, Mn, Fe, and Cu in Portuguese Verde, Maduro, and Porto wines. The basic configuration of the system allowed the determination of Zn, Mn, Fe, and Cu, the latter in concentrations higher than 0.20 mg/L. Selecting a sample volume of 340 mu L allowed the determination of Zn and Mn up to 1.50 and 3.00 mg/L, respectively. The Fe determination was accomplished using 85, 120, and 340 mu L sample volumes for Fe contents in the range of 1.50 to 15.00 mg/L, 0.50 - 10.00 mg/L, and 0.25 - 5.00 mg/L, respectively. Wine samples with Cu contents in the 0.20 to 2.00 mg/L range were analyzed with a sample volume of 750 mu L. The determination of Cu trace levels was carried out using an heterogeneous-phase pre-concentration unit composed of a commercial cartridge packed with silica C18 coupled to the system. Cu was retained as diethylammonium-N,N-diethyldithiocarbamate chelate. Using about 2 mL of sample allowed determination of Cu between 0.05 and 0.50 mg/L. A comparison of the results obtained by the proposed methodologies and the reference procedures presented relative deviations less than 5%. Repeatability of determinations was always better than 3% (RSD).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6