石墨炉原子吸收光谱法测定大米中镉的不确定度评定  

Uncertainty evaluation in determination of cadmium in rice by graphite furnace atomic absorption spectrometry

作　　者：岳蕴瑶[1] 张婷[1] 蒋芳[1] 

机构地区：[1]四川省绵阳市疾病预防控制中心,621000

出　　处：《职业与健康》2014年第11期1518-1520,共3页Occupation and Health

摘　　要：目的对石墨炉原子吸收光谱法测定大米中镉的全过程进行分析,分析不确定度的影响因素,并对其不确定度进行评定。方法根据GB/T 5009.15-2003的方法,用石墨炉原子吸收法测定大米中镉,依据JJF 1059-1999要求,对各个不确定度分量和测量结果的不确定度进行评定。结果实验测定大米中镉含量为(175±12)μg/kg,在标准物质证书给定的标准值与不确定度为(180±20)μg/kg的范围内。结论该实验室,用石墨炉原子吸收光谱法测定大米中镉含量,其结果准确可靠。[ Objective ] To analyze the whole determination process of cadmium in rice by graphite furnace atomic absorption spectrometry, study the influencing factors of uncertainty, and evaluate the uncertainty. [ Methods ] The content of cadmium in rice was detected by graphite furnace atomic absorption spectrometry according to the method of GB/T 5009.15-2003. In accordance with the requirements of JJF 1059-1999, the uncertainty components and the uncertainty of measurement results were evaluated. [ Results] The result showed that the content of cadmium in rice was ） （ 175 ± 12 } μg/kg, which was within the range of the standard value and uncertainty of standard material 1180 ±20） μg/kg. [ Conclusion] The results of cadmium content in rice, which are determined by graphite furnace atomic absorption spectrometry in this laboratory, are accurate and reliable.

关 键 词：石墨炉原子吸收光谱法 测定 大米 镉 不确定度 

分 类 号：R115[医药卫生—公共卫生与预防医学]