Mihucz Victor G, Done Carla J, Tatár Eniko, Virág István, Záray Gyula, Baiulescu Emil G
Joint Research Group of Environmental Chemistry of Hungarian Academy of Sciences & L. Eötvös University, P.O. Box 32, H-1518 Budapest, Hungary; Hungarian Satellite Centre of Trace Elements Institute to UNESCO, P.O. Box 32, H-1518 Budapest, Hungary.
Talanta. 2006 Dec 15;70(5):984-90. doi: 10.1016/j.talanta.2006.05.080. Epub 2006 Jun 27.
The rare earth element (REE) concentrations of 19 Romanian young wine samples originating from the Dealurile Moldovei viticulture area were determined by double focusing inductively coupled plasma mass spectrometry (DF-ICP-MS) after microwave-assisted digestion with nitric acid. The determination of Eu was hampered by the BaO molecular interference. Generally, the red wine samples were more concentrated for REEs than the white wine samples studied. The REE concentrations of the four bentonites (Gelbenton, Evergel, BW200, Tükrös) determined after their fusion were higher by three orders of magnitude than those of the wine samples. After a simulated wine purification process performed with these bentonite samples and a red and white pool samples, the REE concentrations of the clarified wine samples increased by 1.2-1.5 times for red, and 1.3-3 times for white wines in case of the fibrous bentonite sample (Gelbenton), by about 2-5 times in case of the bentonite containing ovalbumin, caseine and gelatine (Evergel), meanwhile this factor was about 20-25 for Na bentonite powder samples (BW200, Tükrös). On basis of the chemometric evaluation using the REE concentrations as input data, the majority of the Feteasca wines belonged to the same cluster as well as the two Cabernet Sauvignon to another subcluster. The adequate choice of the bentonite may allow the use of REEs as fingerprints for determining the wine provenance.
采用硝酸微波辅助消解后，利用双聚焦电感耦合等离子体质谱法（DF-ICP-MS）测定了来自摩尔多瓦丘陵葡萄种植区的19个罗马尼亚年轻葡萄酒样品中的稀土元素（REE）浓度。Eu的测定受到BaO分子干扰的阻碍。一般来说，所研究的红酒样品中的REE浓度高于白酒样品。测定了四种膨润土（Gelbenton、Evergel、BW200、Tükrös）熔融后的REE浓度，其浓度比葡萄酒样品高三个数量级。在用这些膨润土样品以及一个红白混合样品进行模拟葡萄酒净化过程后，对于纤维状膨润土样品（Gelbenton），澄清后的红酒样品中的REE浓度增加了1.2 - 1.5倍，白酒样品增加了1.3 - 3倍；对于含有卵清蛋白、酪蛋白和明胶的膨润土（Evergel），该倍数约为2 - 5倍；而对于钠膨润土粉末样品（BW200、Tükrös），这个倍数约为20 - 25倍。基于以REE浓度作为输入数据的化学计量学评估，大多数费泰斯卡葡萄酒属于同一聚类，两种赤霞珠葡萄酒属于另一个子聚类。适当选择膨润土可以使REE用作确定葡萄酒产地的指纹。
