原子吸收光谱法测定石斑鱼中铬的不确定度评定

摘要

铬是人体必需的微量元素，对人体十分有利。三价的铬是对人体有益的元素，它在维持人体健康方面起关键作用，它是正常生长发育和调节血糖的重要元素。而六价铬是有毒的，准确测定六价铬有非常重要的意义。依据GB 5009.123－2004，测定石斑鱼中的铬含量，对检测过程中引入的不确定度进行分类和量化，评估了各个不确定度分量，得到该方法的相对扩展不确定度为5.03μg／kg。%According to GB 5009.123-2014, determination of chromium in rudd was determined by Atomic Absorption Spectrometry ( AAS) , the components of uncertainty in the detection process were classified and quantified, and evaluated systematically.The uncertainty evaluation for determination of melamine in food contacted materials by AAS was established, the relative expanded uncertainty was 5.03 μg/kg.