Waegeneers Nadia, Hoenig Michel, Goeyens Leo, De Temmerman Ludwig
Veterinary and Agrochemical Research Centre (VAR-CODA-CERVA), Leuvensesteenweg 17, B-3080 Tervuren, Belgium.
Sci Total Environ. 2009 Jul 15;407(15):4397-402. doi: 10.1016/j.scitotenv.2008.10.031. Epub 2008 Nov 30.
The purpose of this study was to evaluate the levels of arsenic, cadmium, lead, copper and zinc in home-produced eggs, soils and kitchen waste samples of private chicken owners in Belgium, and to determine spatiotemporal differences in trace element contents in eggs. Eggs were sampled in all provinces of Belgium in autumn 2006 and spring 2007. A total number of 59 private chicken owners participated in the study. Trace elements were determined by inductively coupled plasma-mass spectrometry except for mercury, which was determined by atomic absorption of mercury vapour. The mean fresh weight concentrations in eggs in autumn and spring respectively were <8.0 and <8.0 microg/kg for arsenic, 0.5 and <0.5 microg/kg for cadmium, 116 and 74 microg/kg for lead, 0.43 and 0.52 mg/kg for copper, 20.3 and 19.2 mg/kg for zinc, and 3.15 and 4.44 microg/kg for mercury. Analysis of variance determined significant differences in some trace element concentrations in eggs among seasons and regions in Belgium. Average concentrations of arsenic, cadmium and mercury corresponded well with values measured in other countries, while copper and zinc concentrations were within the same order of magnitude as in other countries. Average lead concentrations were high compared to concentrations in eggs from other countries and correlated well with lead concentrations in soil, indicating that the soil is an important source. Other sources of trace elements in eggs might be home-grown vegetables and forage (grass and herbs), and indirectly, air pollution.
本研究旨在评估比利时私人养鸡户自家生产的鸡蛋、土壤和厨房垃圾样本中的砷、镉、铅、铜和锌含量，并确定鸡蛋中微量元素含量的时空差异。2006年秋季和2007年春季在比利时所有省份采集了鸡蛋样本。共有59位私人养鸡户参与了该研究。除汞采用汞蒸气原子吸收法测定外，其他微量元素均采用电感耦合等离子体质谱法测定。秋季和春季鸡蛋中各元素的平均鲜重浓度分别为：砷<8.0和<8.0微克/千克，镉0.5和<0.5微克/千克，铅116和74微克/千克，铜0.43和0.52毫克/千克，锌20.3和19.2毫克/千克，汞3.15和4.44微克/千克。方差分析确定了比利时不同季节和地区鸡蛋中某些微量元素浓度存在显著差异。砷（As）、镉（Cd）和汞（Hg）的平均浓度与其他国家测得的值吻合良好，而铜（Cu）和锌（Zn）的浓度与其他国家处于同一数量级。与其他国家鸡蛋中的铅浓度相比，平均铅浓度较高，且与土壤中的铅浓度相关性良好，表明土壤是一个重要来源。鸡蛋中微量元素的其他来源可能是自家种植的蔬菜和饲料（草和草药），以及间接的空气污染。
