原子吸收法测定牛奶中铜镉铅的不确定度评定

Evaluation of measurement uncertainty in the determination of Cu,Cd and Pb in milk by GAAS

对原子吸收法测定牛奶中铜、铅、镉含量的不确定度进行了分析,确定样品消解带来的不确定度是影响测定不确定度的最主要来源.对市售纯牛奶中铜、镉、铅的测定结果分别为32.32±1.94,1.59±0.12,45.30±2.10μg/kg.

The uncertainty in the determination of Cu,Cd and Pb in milk by GAAS was analyzed. The main influencing of the uncertainty was digestion of sample. The contents of Cu,Cd and Pb in milk were （μg/kg） ： 32.32±1.94;1.59±0.12;45.30±2. 10,respectively.