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目的:评定工作场所中镍及化合物测量结果的不确定度,为原子吸收光谱法测定其他金属元素的不确定度分析提供参考。方法:找出实验过程中各不确定度分量,计算合成标准不确定度以及扩展不确定度。结果:不确定度的主要来源:采样带来的不确定度(0.020)、测量重复性的不确定度(0.0091)、消解回收率测定不确定度(0.0098)。结论:运用该不确定度评定方法对测定过程中关键环节的识别,将有助于检测人员重点关注关键环节的质量控制,更为有效地提高检测工作的质量。
OBJECTIVE: To assess the uncertainty of measurement results of nickel and compounds in the workplace and provide reference for the determination of the uncertainty of other metal elements by atomic absorption spectrometry. Methods: Identify the components of uncertainty during the experiment, calculate the standard uncertainty of synthesis, and extend the uncertainty. Results: The main sources of uncertainty are: sampling uncertainty (0.020), measurement repeatability uncertainty (0.0091), and digestion recovery uncertainty (0.0098). Conclusion: The identification of the key links in the measurement process by using the method of uncertainty assessment will help the inspectors focus on the quality control of key links and improve the quality of testing more effectively.