采用流通式阳极溶出计时电位法测定苹果饮料中镉、铜、铅和锌的总浓度及其活性形态分数。
Determination of the total cadmium, copper, lead and zinc concentrations and their labile species fraction in apple beverages by flow-through anodic stripping chronopotentiometry.
作者信息
Jedryczko Dominika, Pohl Paweł, Welna Maja
机构信息
Wroclaw University of Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wybrzeze Stanislawa Wyspianskiego 27, 50370 Wroclaw, Poland.
Wroclaw University of Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wybrzeze Stanislawa Wyspianskiego 27, 50370 Wroclaw, Poland.
出版信息
Food Chem. 2017 Jun 15;225:220-229. doi: 10.1016/j.foodchem.2016.12.092. Epub 2017 Jan 5.
An analytical procedure for operationally defined speciation of Cd, Cu, Pb and Zn in apple beverages by anodic stripping chronopotentiometry (ASCP) is presented. Optimal measurement conditions were set down to reliably determine the fraction of the labile metals species. The mean total concentrations of Cu, Pb and Zn were 69±20, 7.3±3.3, and 129±59μgL in apple juices, and 18±3, 4.2±0.1, 53±5μgL in apple drinks, respectively. The contributions of the fraction of the ASCP-labile species varied from 43 to 63% (Cu), from 32 to 42% (Pb) and from 38 to 58% (Zn). The Cd content in all analyzed samples was below 0.02μgL. The detection limits (DLs) achieved for Cu, Pb and Zn were 0.04μgL (Cu), 0.02μgL (Pb), and 0.10μgL (Zn).
本文介绍了一种通过阳极溶出计时电位法（ASCP）对苹果饮料中镉、铜、铅和锌进行操作定义形态分析的方法。确定了最佳测量条件，以可靠地测定不稳定金属形态的比例。苹果汁中铜、铅和锌的平均总浓度分别为69±20、7.3±3.3和129±59μg/L，苹果饮料中分别为18±3、4.2±0.1、53±5μg/L。ASCP不稳定形态的比例贡献在43%至63%（铜）、32%至42%（铅）和38%至58%（锌）之间。所有分析样品中的镉含量均低于0.02μg/L。铜、铅和锌的检测限分别为0.04μg/L（铜）、0.02μg/L（铅）和0.10μg/L（锌）。
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