原子吸收光谱法测定白砂糖中铜的结果不确定度评定

摘要

采用国家标准《《食品中铜的测定》GB/T 5009.13-2003中原子吸收光谱法进行白砂糖铜含量测定,找出影响测定结果不确定度的因素,通过建立数学模型对各个不确定度分量进行计算,最终给出该法测定结果的合成标准不确定度和扩展不确定度.%By the determination of Copper in white granulated sugar according to the method in National Standard Determination of copper in food GB/T 5009.13-2003, the influence factors of uncertainty were found, and the mathematical model was established to calculate the component uncertainty. The combined standard uncertainty and the expanded uncertainty of the method were given eventually.