National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
Food Chem Toxicol. 2010 Aug-Sep;48(8-9):2357-60. doi: 10.1016/j.fct.2010.05.071. Epub 2010 Jun 1.
In the present work four metals (Zn, Cd, Pb and Cu) were determined simultaneously in 28 commercial broiler poultry feeds by differential pulse anodic stripping voltammetry (DPASV) using hanging mercury drop electrode (HMDE). The digestion of poultry feeds was carried out with concentrated nitric acid and hydrogen peroxide (2:1) with the help of microwave heating. Acetate buffer of pH 5 was used as a supporting electrolyte. The limit of detection for Zn, Cd, Pb and Cu was 0.69, 0.35, 0.68 and 0.24 microg/kg, respectively. The amount of Zn, Cd, Pb and Cu in the analyzed poultry feeds was ranged between 54.3-482.2, 3.8-33.6, 23.2-32.6 and 12.3-65.8 mg/kg, respectively. In most of analyzed poultry feed samples, the amount of Cd and Pb was found to be greater than the maximum tolerable level (MTL) which could be harmful for the poultry.
本工作采用悬汞滴电极（HMDE）的差分脉冲阳极溶出伏安法（DPASV），同时测定了 28 种商业肉鸡饲料中的 4 种金属（Zn、Cd、Pb 和 Cu）。在微波加热的帮助下，用浓硝酸和过氧化氢（2:1）对家禽饲料进行消解。pH5 的乙酸盐缓冲液用作支持电解质。Zn、Cd、Pb 和 Cu 的检出限分别为 0.69、0.35、0.68 和 0.24μg/kg。在所分析的家禽饲料中，Zn、Cd、Pb 和 Cu 的含量在 54.3-482.2、3.8-33.6、23.2-32.6 和 12.3-65.8mg/kg 之间。在大多数分析的家禽饲料样品中，Cd 和 Pb 的含量均高于最大耐受水平（MTL），这可能对家禽有害。
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