[1]王新建,黄 涛,秦娜娜.原子吸收法测定大米粉中镉的不确定度评定[J].医学信息,2018,31(16):59.[doi:10.3969/j.issn.1006-1959.2018.16.016]
　WANG Xin-jian,HUANG Tao,QIN Na-na.Evaluation of Uncertainty in Determination of Cadmium in Rice Flour by Atomic Absorption Method[J].Journal of Medical Information,2018,31(16):59.[doi:10.3969/j.issn.1006-1959.2018.16.016]
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原子吸收法测定大米粉中镉的不确定度评定()
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医学信息[ISSN:1006-1959/CN:61-1278/R]

卷:
31卷
期数:
2018年16期
页码:
59
栏目:
论著
出版日期:
2018-08-15

文章信息/Info

Title:
Evaluation of Uncertainty in Determination of Cadmium in Rice Flour by Atomic Absorption Method
文章编号:
1006-1959（2018）16-0059-04
作者:
王新建; 黄 涛; 秦娜娜
乌鲁木齐市疾病预防控制中心，新疆 乌鲁木齐 830026
Author(s):
WANG Xin-jian; HUANG Tao; QIN Na-na
Urumqi Center for Disease Control and Prevention,Urumqi 830026,Xinjiang,China
关键词:
原子吸收法; 不确定度; 镉; 大米粉
Keywords:
Key words：Atomic absorption method; Uncertainty; Cadmium; Rice flour
分类号:
R714.22
DOI:
10.3969/j.issn.1006-1959.2018.16.016
文献标志码:
A
摘要:
目的 采用无火焰原子吸收法对大米粉中的镉进行测定。方法 分析测量不确定的主要来源，在整个分析测定过程：称量、容量器具的体积、标准物质、直线回归方程、重复性测定和仪器示值误差等是不确定度的主要来源。结果 按照JJF 1059.1-2012《测量不确定度评定与表示》的规定进行评定，舍弃贡献小，可以忽略不计的不确定度分量，最终计算给出扩展不确定度为： K=2，U=48 μg/kg，CCd=（300.01±48.00）μg/kg。结论 该结果更加客观和接近真值，降低了检测机构的检测风险。
Abstract:
Abstract：Objective To determine the cadmium in rice flour by flame atomic absorption spectrometry.Methods Analyze the main sources of measurement uncertainty.Throughout the analysis and measurement process:weighing,volume of volumetric instruments, reference materials,linear regression equations,repeatability measurements and instrumental indication errors are the main sources of uncertainty.Results According to JJF 1059.1-2012"Measurement Uncertainty Evaluation and Representation",the contribution is small, the negligible uncertainty component is discarded,and the final calculation gives the extended uncertainty as:K=2,U=48μg/kg, CCd=(300.01±48.00)μg/kg.Conclusion The result is more objective and close to the true value,which reduces the detection risk of the testing organization.

参考文献/References:

[1]China National Accreditation Board for Laboratories.Guide to the Evaluation of Uncertainty in Chemical Analysis[M].Beijing:China Metrology Publishing House,2002.
[2]高瑞峰，高孟朝,凌睿,等.ICP-MS测定淀粉铝含量不确定度评定及改进方法[J].光谱学与光谱分析,2016,36(4):1211-1216.
[3]Ellison SRL,Williams A,Silva RBD,et al.Quantifying Uncertainty in Analytical Measurement(QUAM)[M].2012.

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更新日期/Last Update: 2018-08-15