Jeng S L, Yang C P
Department of Animal Science, National Taiwan University, Taipei.
Poult Sci. 1995 Jan;74(1):187-93. doi: 10.3382/ps.0740187.
Samples of duck eggs were collected from 65 farms distributed in 6 counties in Taiwan to analyze the contents of Pb, Cd, Hg, and Cu in albumen and yolk. Lead, Cd, and Cu determinations were performed by microwave digestion together with atomic absorption spectrophotometry, whereas Hg was analyzed by sulfuric acid-nitric acid digestion and cold vapor atomic absorption spectrophotometry. Expressed on a wet weight basis, the average concentrations (ranges) of the four metals were as follows: Pb, 13.6 ng/g (.8 to 27.5) in albumen and 84.7 ng/g (44.8 to 224.7) in yolk; Cd, 1.8 ng/g (< .5 to 4.4) in albumen and 3.8 ng/g (< 1.0 to 5.7) in yolk; Hg, 17.8 ng/g (2.5 to 47.5) in albumen and 9.7 ng/g (1.2 to 20) in yolk; Cu, .83 micrograms/g (.56 to 1.08) in albumen and 1.36 micrograms/g (.95 to 1.95) in yolk. Comparison of the calculated daily intakes of Pb, Cd, and Hg from eggs with the World Health Organization-Food Agriculture Organization provisional tolerated daily intakes suggest that duck eggs are safe with respect to the contents of the three metals. Eggs are poor sources of Cu, supplying less than 2% of the Recommended Dietary Allowance.
从台湾6个县的65个农场采集鸭蛋样本，分析蛋白和蛋黄中铅、镉、汞和铜的含量。铅、镉和铜的测定采用微波消解结合原子吸收分光光度法，而汞则通过硫酸 - 硝酸消解和冷蒸气原子吸收分光光度法进行分析。以湿重计，四种金属的平均浓度（范围）如下：蛋白中铅为13.6纳克/克（0.8至27.5），蛋黄中为84.7纳克/克（44.8至224.7）；蛋白中镉为1.8纳克/克（<0.5至4.4），蛋黄中为3.8纳克/克（<1.0至5.7）；蛋白中汞为17.8纳克/克（2.5至47.5），蛋黄中为9.7纳克/克（1.2至20）；蛋白中铜为0.83微克/克（0.56至1.08），蛋黄中为1.36微克/克（0.95至1.95）。将鸡蛋中铅、镉和汞的计算每日摄入量与世界卫生组织 - 联合国粮食及农业组织的暂定每日耐受摄入量进行比较表明，就这三种金属的含量而言，鸭蛋是安全的。鸡蛋是铜的贫乏来源，提供的铜不到推荐膳食摄入量的2%。
