DETERMINATION OF HEAVY METALS CONCENTRATION IN WINE USING INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY (ICP-MS)

Abstract

The determination of metals in different type of wines is of high importance for the nutritional, as well as toxic effects of these elements. The main purpose of this research is to determine the concentration of Cu, Fe, Mn, Cd, Zn and Pb in wine. The analyzed samples were wine samples obtained under micro-vinification conditions and from grapevine cultivars for the white wines (Feteasca Alba, Feteasca Regala, Babeasca Gri, Sarba) and for the red wines (Merlot, Feteasca Neagră, Cabernet Sauvignon). The highest concentrations were obtained in the cultivars of grapevine for the red wines (49.86 ± 1.32 μg/L Pb) recorded by the Feteasca Neagra cultivar and (0.23 ± 0.01 μg/L Cd) for the Merlot cultivar. In the case of Cu, Zn, Fe and Mn, the highest concentrations were recorded by the vines for white wines (532.48 ± 13.79 μg/L Cu, 1845.23 ± 32.58 μg/L Zn, 1654.98 ± 26.68 μg/L Fe, 221.32 ± 17.49 μg/L Mn) in comparison to the cultivars of vines for red wines. The conclusions obtained from the analysis of heavy metals in wines through ICP-MS are as follows: grapevine cultivars for red wine recorded the highest concentrations of Cd and Pb and the grapevine cultivars for white wines recorded the highest concentrations of Cu, Zn, Fe and Mn.Wine samples do not have a metal ion concentration higher than the maximum concentration allowed by law.The storage temperature does not affect the concentration of heavy metals, dry wine has a higher concentration of heavy metals in its composition.