Article

Determination of metals in wine with atomic spectroscopy (flame-AAS, GF-AAS and ICP-AES); a review

Department of Sciences and Advanced Technologies, University of East Piedmont, Alessandria, Italy.
Food Additives and Contaminants (Impact Factor: 2.13). 03/2002; 19(2):126-33. DOI: 10.1080/02652030110071336
Source: PubMed

ABSTRACT Metals in wine occur at the mg l(-1) level or less and, though not directly related to the taste of the final product, their content should be determined because excess is undesirable, and in some cases prohibited, due to potential toxicity. Lead content in wine, for example, is restricted in several states by legislation to guarantee consumer health protection. Of several methods for metal determination, techniques of atomic spectroscopy are the most sensitive and rapid. Most of the elements present in wine can be determined with these techniques, at concentrations ranging from the mg l(-1) to the microg l(-1) level. Here, inductively coupled plasma-atomic emission spectrometry (ICP-AES), flame atomic absorption spectrometry (flame-AAS) and graphite furnace-atomic absorption spectrometry (GF-AAS) are compared for their characteristics as employed in metal determination in wine.

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    • "The content of lead, cadmium, and copper in wines from hybrid grapes was found to be from 39% to 58% below the average of our experiment (Table 4). The amount of lead in wine is restricted in several countries by law to guarantee consumer health protection (Aceto et al., 2002). In our experiment higher concentrations of Pb were detected in the PNRo and the CSFr, lower concentrations in wines from Chile and Estonia. "
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    • "The concentrations of several trace elements vary considerably even in foods belonging to similar groups, and those of both minor and trace elements vary widely between foods belonging to different groups. The problem of trace element analysis can be overcome by freeze-drying of mixed diets as this may lead to six fold enrichment of the component(Benramdane 1999; Aceto 2002). "
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    • "Precision values for K, Mg, Na, Fe and Zn were below 1%, whilst Ca variability was equal to 5.56%. Even tough AAS does not have a good sensitivity for other cations, it is well suited for determining the ions selected here (Aceto et al., 2002). "
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