engleski

Metals in organically and conventionally produced wines in Croatia

Wine is a popular and widely consumed alcoholic beverage and economically important product. Daily consumption of wine in moderate amounts contributes significantly to the needs of human body for essential elements, while As, Cd, and Pb are known as potentially toxic. Consuming and growing organic food, including wine, is increasing and so is the need to determine elements in organically produced wines. The aim of this work was to assess the impact of organic wine production on the levels of metal residues in the samples collected from the most important Croatian winegrowing regions. Eleven locations with organic wine production were selected in different winegrowing regions of Croatia (Central and Northern Croatia, Istria, Northern Dalmatia, Vis Island). In each location, wine samples from both, organic and conventional wine producers were collected and analysed for metal content (15 organic wine samples and 16 conventional wine samples). Flame atomic absorption spectrometry (AAS) was used for the determination of Zn, Fe, and Cu and inductively coupled plasma mass spectrometry (ICP-MS) was used for the determination of Na, Al, Cr, Ni, As, Cd, Sn, Pb, and Ag content in wines. All wines contained significantly lower levels of residues in comparison with maximum residue limits (MRLs), with the exception of one organically produced wine containing excessive amounts of copper (1043 µg L-1) and Zn (5706 µg L-1) exceeding the current MRL. There were no significant differences in the mean concentrations of analysed metals between organically and conventionally produced wines with the exception of Pb and Mg being significantly less represented in organic wines.

copper ; ICP-MS ; maximum residue limits

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