Validation and comparison of analytical methods by flame atomic absorption spectrometry for determination of copper and iron in wines and brandies | Validation et comparaison des methodes analytiques de spectrometrie d'absorption atomique de flamme pour la determination du cuivre et du fer dans les vins et les eaux-de-vie
2003
Catarino, S. | Pinto, D. | Curvelo-Garcia, A.S.
The knowlegde of copper and iron contents in wines and brandies is important because these metals may involve haze formation during their storage. This paper presents the determination of total contents of the two metals in these beverages, by flame atomic spectrometry. The methods described by portuguese normas, were validated and its analytical characteristics were verified. Their apliccation for determination of some wines and brandies with low contents, may present some dificulties. The method of standard additions, widely practised in these situations, was also studied, and the precision of the two methods was compared. Because it is an extrapolation method, is thus less precise than the interpolation methods. We also present the results of the participation in an interlaboratory assay
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