目的 分析葡萄酒中金屬元素的水平。方法 以3大國產(chǎn)品牌(張裕、王朝、長城)的26種葡萄酒為樣品,經(jīng)微波消解后,采用原子吸收光譜法測量了其中鉛(Pb)、鎘(Cd)、銅(Cu)3種重金屬元素的量。結(jié)果 對于所測元素,標準曲線的相關(guān)系數(shù)均為r>0.999 5,Pb的檢測限為0.006mg/L,Cd的檢測限為0.029 μg/L,Cu的檢測限為0.014 mg/L,各元素RSD均在0~9%之間,加樣回收率91.78%~109.8%。26種葡萄酒中Pb、Cd、Cu 3種元素的平均質(zhì)量濃度分別為35.357 μg/L、3.974 μg/L、0.684 mg/L。結(jié)論 該方法快速準確、靈敏度高,操作簡單,分析速度快,為這3種元素在葡萄酒中的含量測定提供參考。26種葡萄酒樣品中3種重金屬元素的量均未超標。

Objective People all know that drinking wine has benefit for our health. With the frequent food safety incidents the quality and safety of wine have attracted a lot of attention. The levels of metal elements in wine can affect the body's immune function, metabolism, and so on. Methods This paper collected 26 kinds of China wine from three local brands including Zhang Yu, Dynasty, and Great Wall wines. A method for the determination of heavy metal (Pb, Cd, and Cu) in them by atomic absorption spectrometers (AAS) with microwave digestion was developed. Results For all of the analyzed elements, the correlative coefficient of the calibration curves was over 0.9995. The detection limit of lead was 0.006 mg/L, the detection limit of copper was 0.014 mg/L and the detection limit of cadmium was 0.029 μg/L. The precision RSD was in the range of 0—9%. The recovery rate of detected elements was between 91.78% and 109.8%. Conclusion The analytical method is quick-acquired, accurate, and highly sensitive. The content of the three kinds of heavy metal elements in all wine samples do not exceed the standard, which guarantees the quality and the character of wine.

遼寧省博士啟動基金(20111135);遼寧省“大學生創(chuàng)新訓練計劃”項目(201210163026);沈陽市科技計劃項目(F11-153-9-00)