高兴海^1，2

（1.中轻合盛科技有限公司，滁州239000；2.中国轻工业食品检验检测中心（滁州），滁州239000）

摘要：根据CNAS—GL002：2018《能力验证结果的统计处理和能力评价指南》中同步计划实验的统计数据，分别采用四分位距法和迭代法对数据结果进行分析，并分别计算z 比分数和z′比分数，确认两种分析方法在能力验证计划项目中的可行性。结合SPSS软件数据统计分析，z 比分数和z′比分数差异显著（P＜0.05），在专家公议值不明确时，迭代法更适合于饮料中苯甲酸、山梨酸的检测结果分析与评估。

关键词：能力验证计划；z 比分数；z′比分数；定量分析

中图分类号：TS207.5 文献标识码：A 文章编号：1674-506X（2025）05-0131-0006

The Influence of Iterative and Interquartile Range Methods on the Quantitative Analysis of Proficiency Evaluation in Proficiency Testing Provider Project

GAO Xinghai^1，2

（1.China Light Industry Hesheng Technology Co.，Ltd.，Chuzhou 239000，China；

2.China Light Industry Food Test and Detection Center （Chuzhou），Chuzhou 239000，China）

Abstract: On the basis of the statistical data of the synchronous planned experiments of CNAS—GL002：2018 “Guidance on Statistic Treatment of Proficiency Testing Results and Performance Evaluation”，data results were analyzed separately with iterative method and quartile range method and z score and z′ score were calculated， the feasibility of two analysis methods was confirmed in proficiency testing project. Combined with SPSS software data statistical analysis，z score and z′ score were obviously different （P＜0.05） . If the expert consensus value was unknown，the iterative method was more suitable for the analysis and evaluation of test results of benzoic acid and sorbic acid in beverages.

Keywords: proficiency testing project；z score；z′ score；quantitative analysis

doi: 10.3969/j.issn.1674-506X.2025.05-017