保健食品中山梨酸含量测定能力验证结果分析

Analysis of proficiency test results for determination of sorbic acid in health food

目的分析测定保健食品中山梨酸的能力验证结果。方法用单因素方差分析和t检验对样品的均匀性和稳定性进行了检验。对参加能力验证项目并反馈结果的实验室所报结果进行稳健统计分析,用Z比分数评价各实验室检测能力。结果制备的样品均匀性符合要求并且在能力验证计划实施的周期内保持稳定,能够满足能力验证计划的要求。52家反馈结果的实验室中39家结果为满意结果,满意率为75%。结论多数参加本次能力验证项目的实验室数据结果评价为满意,表明总体上本次能力验证项目参加单位的检测水平良好。

Objective To analyze the proficiency test results for determination of sorbic acid in health food.Methods Homogeneity and stability of samples were tested and confirmed by one-way ANOVA and t test.Robust statistical of proficiency testing results was conducted to evaluate the performance of laboratories through analysis of Z score.Results The homogeneity of the prepared sample met the requirements and remained stable during the period of the proficiency testing.Thirty-nine of 52 laboratories had satisfactory results,accounting for 75%.Conclusion The majority of participant laboratories passed the proficiency testing with satisfactory results,indicating that the testing capability for determination of sorbic acid in health food is acceptable.