| Popis: |
Wine is a very complex natural product consisting of organic and inorganic compounds that have a great influence on wine quality. Mineral composition of wines is an important factor that influences its quality as well as nutritional value. Determination of the elemental composition of wines is very important from toxicological point of view, not only since it could contain harmful elements, such as Pb, As and Cd, but also, from nutritional point of view, since wine contains essential elements for the human organism, such as Ca, Cr, Co, K, Se and Zn. In this study, lead and cadmium were determined in white wines from Smederevka, Chardonnay and Riesling varieties from Tikveš and Skopje regions, applying electrothermal atomic absorption spectrometry (ETAAS) [1]. Wine samples were directly injected into the ETAAS system, using matrix modifiers for Pb and Cd, and obtaining peaks with good shapes, without any interference. The accuracy and precision of the method were checked, obtaining satisfactory results and confirming that the method is accurate and convenient for quantitative analysis of the harmful elements Pb and Cd in wines. The lead and cadmium concentrations ranged between 2–28.5 and 0.4–5.69 μg/L, respectively, confirming that wines did not contain these harmful elements in concentrations above the maximal allowed and wines are safety for consumption. |
