电感耦合等离子体原子发射光谱法测定IN718镍基高温合金中铌的不确定度评定及快速评定方法分析  

Uncertainty evaluation for determination of niobium in IN718 nickel-based superalloy by inductively coupled plasma atomic emission spectrometry and analysis of rapid evaluation method

作　　者：王祥德 刘含笑 柏占明 顾续盛 杨雪茹 刘凯 WANG Xiangde;LIU Hanxiao;BAI Zhanming;GU Xusheng;YANG Xueru;LIU Kai(China United Test&Evaluation(Qingdao)Co.,Ltd.,Qingdao 266000,China;Western Superconducting Technologies Co.,Ltd.,Xi′an 710000,China)

机构地区：[1]国合通用(青岛)测试评价有限公司,山东青岛266000 [2]西部超导材料科技股份有限公司,陕西西安710000

出　　处：《冶金分析》2024年第12期47-54,共8页Metallurgical Analysis

摘　　要：测量不确定度可直观地体现测定过程的质量控制水平,随着国内GB/T 22553等标准的发布实施,Top-down法越来越受到重视。分别基于Top-down法和GUM法对IN718镍基高温合金中铌含量测定的不确定度进行评定和比较,发现以Top-down法中再现性标准差sR评定的不确定度明显高于GUM法评定的结果。对近年金属材料不确定度评定相关文献进行分析,使用简化Top-down法,利用中间精密度评定的不确定度与GUM法评定的不确定度的比值U(Rw)/U(w)经稳健统计方法处理,稳健平均值为1.20,稳健标准偏差为0.48,说明两种方法的评定结果一致性良好。与GUM法相比,简化Top-down法无需识别称量、标准物质、重复性等分量,无需进行繁琐的计算与合成,评定过程简单、易操作,该方法的使用能够帮助实验室方便快捷的评定不确定度,促进实验室质量控制水平的提升。The determination uncertainty could intuitively reflect the quality control level of determination process.With the issue and implementation of standards such as GB/T 22553,Top-down method has attracted more and more attention.The determination uncertainty of niobium content in IN718nickel-based superalloy was evaluated and compared based on Top-down method and GUM method.It was found that the uncertainty evaluated by reproducibility standard deviation(sR)in Top-down method was much higher than that in GUM method.The related references about the uncertainty evaluation of metal materials in recent years were analyzed.The simplified Top-down method was used.The ratio(U(Rw)/U(w))of the uncertainty evaluated by intermediate precision to the uncertainty evaluated by GUM method was treated by robust statistical method.It was found that the robust mean value was 1.20,and the robust standard deviation was 0.48,indicating that the evaluation results of the two above methods were in good agreement.Compared to GUM method,the simplified Top-down method did not require to identify the components of weighing,certified reference material and repeatability.Moreover,the complicated calculation and combination were not necessary.The evaluation process was simple and easily conducted.The proposed method could help the laboratories evaluate the uncertainty conveniently and rapidly,which could promote the improvement of laboratory quality control level.

关 键 词：不确定度评定 Top-down法 GUM法 中间精密度 镍基高温合金 IN718 电感耦合等离子体原子发射光谱法(ICP-AES) 铌 

分 类 号：O657.31[理学—分析化学] TF031[理学—化学]