大米粉中镉含量不确定度评定

Uncertainty evaluation of cadmium content in rice flour

根据CSM01 010 103-2006要求,对石墨炉原子吸收测定大米粉中镉含量的结果进行不确定度评定。结果表明,大米粉中镉含量为(162±6)μg/kg。测量重复性、标准溶液配制和标准曲线是不确定度的主要来源,其中测量重复性产生的不确定度影响最大。

The uncertainty evaluation for the determination of cadmium content with graphite furnace atomic absorption spectrometry in rice flour was measured according to CSM01010103-2006. The result showed that content of cadmium in rice flour was （162 ± 6） μg/kg, the repeated measurements, the preparation of standard solutions and the standard curve were the main sources of uncertainty and the repeated measurements had the most effect on the uncertainty.