某校周边热卖小食品重金属铅镉含量测定

The assessment of lead and cadmium contamination in snacks around a school

目的了解某学校周边热卖小食品中重金属铅镉含量情况。方法对某学校周边热卖小食品抽取22份样本(面制食品、豆制品、糖果类),采用石墨炉原子吸收分光光度法测定其中的铅镉含量,并对结果进行分析。结果所有样品中重金属铅镉均有检出,检出率为100%,所有样品中镉均未超标,铅的超标率为31%。结论某学校周边热卖小食品中铅、镉都有检出,该处学生面临摄入过量铅、镉的风险,相关部门应加强检查和监管的力度。

Objective To investigate the heavy metal lead and cadmium contamination in hot snacks around a school.Methods 22 food samples including flour products,bean products and candies were collected from a school.Heavy metals such as lead and cadmium were detected by graphite furnace atomic absorption spectrometry.ResultsThe detectable rate of lead and cadmium were 100%.The content of cadmium was not exceeded the national standard.The exceeded standard rate of lead was 31%.Conclusion Lead and cadmium were detected in all kinds of foodstuff.The content of lead exceeded the national standard seriously in flour products.Enough attention should be paid because of the biological accumulation.