Mineral contents of some Southern Italian wines

Abstract

Following our study of the mineral contents of some Southern Italian wines, this work reports on the detection of 12 elemental components. The elements were determined using ICP-AES, flame atomic emission or absorption spectroscopy. The values determined for Li, Na, Mg, K, Ca, Rb, Sr and Ba were within the usual ranges for wines (average values for these elements were: 0.010, 26.2; 94.4; 888; 94.0; 3.30, 0.82 and 0.11 mg/l respectively). All the wines contained low levels of As, the concentrations of which were always under 0.20 mg/l, the maximum level permitted by E.E.C. standards. The measuring of Co, Ag, and Sb led us to ascertain, in all the wines, concentrations lower than 0.01 mg/l for Co and Ag and below the instrumental detection level for Sb (0.06 mg/l). In a previous study wines from D.O.C. areas of Southern Italy were analysed by the technique of inductively coupled plasma atomic emission spectroscopy (ICP-AES), for 14 minerals. This paper deals with further investigation of the mineral composition of the same wines for different metal constituents, analysed by ICP-AES, flame atomic emission, or atomic-absorption spectroscopy (two techniques). The first technique was applied to the detection of Co, As, Sr, Ag, Sb, and Ba. The alkaline metals Li, Na, K, and Rb were determined by flame atomic emission, a technique which possesses better detection limits for these elements. For Mg and Ca the atomic absorption methods were applied.

Arsenic and other trace elements in wines of eastern Croatia

“…regulations and comparable with data reported for wine in other countries (Álvarez et al, 2007;Interesse et al, 1994;Kment et al, 2005).…”

“…Only the Cd content of the studied wines is higher than Cd concentrations reported by Šeruga et al (2008), whereas the levels of Cr and Mn are found to be lower than those reported by Šebečić et al (1998). The measured concentrations are also consistent for most of the elements with findings of Kment et al (2005) for Czech wines, Álvarez et al (2007) for Spain wines and Interesse, Lamparelli, and Alloggio (1994) for Italian wines. Kment et al (2005) Table 3 Limits of detection (LOD) and concentrations a of elements (lg/L) obtained for wine samples (A and B -two independent wine bottles from the same year of production).…”

“…differences can be explained by variations in vineyard soil geochemistry and higher degree of anthropogenic influence for Czech and Cretan wines. Interesse et al (1994) found several times higher values of Sr and up to ten times lower values of Al in Italian wines comparing to analysed Croatian wines, which can be explained solely by difference in soil geochemistry. The arsenic concentrations in the analysed wines correspond to levels reported for wines from neighbouring countries and generally from the literature and in all examined samples was below the maximum contaminant level established by Croatian and O.I.V.…”

Determination of arsenic and antimony in wine by electrothermal atomic absorption spectrometry

“…For Sb, it appears to be very few reliable values published [1,8]. The concentrations of As and Sb shown in Table 4 are far below 0.2 mg/L which is specified by a number of countries as the maximum permitted concentration in wine [17].…”

“…In the more recent studies of As in wine, hydride generation atomic absorption spectrometry has been employed [4][5][6][7]. There appears to be no recent results published for Sb in wine; Interesse et al [8] found that the concentration of Sb was below the detection limit of ICP-AES. The hydride technique normally requires a decomposition of the wine sample, which is time consuming and may lead to high blank values or loss of the analyte.…”