摘要
目的以质控图衡量电感耦合等离子体发射光谱法(inductively coupled plasma emission spectrometry,ICP-OES)测定食品中钠实验的准确性,并采用质控图法评定其不确定度。方法以孜然粉中的钠为例,通过对有证质控物质孜然粉GBW(E)100723的期间系列测量,对测量结果进行正态性检验以及准确度检验,建立单值叠加指数加权移动平均值质量控制图和移动极差质量控制图。结果两种控制图中无失控现象或失控趋势,完整地表征了期间系列测量处于受控状态。以质控图方法评定不确定度,测量结果表示为(422±12)mg/100 g,符合质控样品给出的标准值及扩展不确定度。结论质控图适用于理化检测定量分析的长期过程质量控制,与其他质控方式一起使用,可极大完善实验室的质量控制情况。
Objective To measure the accuracy of the experiment of determination of sodium in cumin powder by inductively coupled plasma emission spectrometry(ICP-OES)using quality control chart and evaluate the uncertainty by quality control chart.Methods Taking sodium in cumin powder as an example,through the period series measurement of cumin powder GBW(E)100723,the normality test and accuracy test of the measurement results were carried out,and the single value superposition index weighted moving average quality control chart and moving range quality control chart were established.Results There was no runaway phenomenon or runaway trend in the 2 kinds of control charts,which completely represented the controlled state of the series measurement during the test period.The uncertainty was evaluated by the quality control chart method,and the measurement result was expressed as(422±12)mg/100 g,which was consistent with the standard value and extended uncertainty given by the quality control sample.Conclusion The quality control chart is suitable for long-term process quality control of quantitative analysis of physical and chemical testing,and can be used with other quality control methods to greatly improve the quality control of the laboratory.
作者
余健斌
陆剑华
钟宏星
钟艺维
陈小佩
李芸燕
郭汶彬
YU Jian-Bin;LU Jian-Hua;ZHONG Hong-Xing;ZHONG Yi-Wei;CHEN Xiao-Pei;LI Yun-Yan;GUO Wen-Bin(Institute of Biological and Medical Engineering,Guangdong Academy of Sciences,Guangzhou 510316,China)
出处
《实验室检测》
2023年第6期17-23,共7页
Laboratory Testing
基金
广州基础与应用基础研究项目(202201011296)
关键词
电感耦合等离子体发射光谱法
孜然粉
钠
质量控制
质控图
测量不确定度
inductively coupled plasma emission spectrometry
cumin powder
sodium
quality control
quality control chart
measurement uncertainty
