Determination of metals content from wines by inductively coupled plasma mass spectrometry.

SUMMARY Wine is a complex matrix, which besides water, suga r and alcohol, contains a great variety of components, inorganic as well as organic . The grape varieties, soil and climate, culture and/or winemaking can influence the wine composition. The content of some heavy metals in wine can bring a lot of information on qu ality and authenticity, the uppermost levels being set by OIV- (Organisation International de la Vigne et du Vin). Consequently, the determination of elements that may be present in wi ne at very low concentration, at trace and ultra trace levels, becomes a necessity. An excelle nt tool for detailed characterization of the elementary composition of many samples, including beverages, is considered the ICP-MS (Inductively Coupled Plasma Mass Spectrometry). The objective of this work was to develop a method to determine the metals content in wine samples from Romania vineyards. In order to identify the presence of Al, Cr, Cu, Zn, Mn, Pb, Cd, Co, Ni and Sr by ICP-MS, seven white wines samples, from different regions, were analyzed. Before the analysis, the wine sample s (2,5ml) have been added with pipette in PTF recipients and treated with 2,5 ml HNO3 65%. A synthetic sample of 5 µg/L of Multielement XXI CertiPur concentration of Al, Zn, Mn, Pb, Cu, Cd, Ni, Cr, Co, Sr was prepared for recovery. Covered recipients were intr oduced into the Mars 5 Microwave oven and mineralized. The recovery after destruction in the digestion oven was 73% and 107%.