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.
标题:保健食品中山梨酸含量测定能力验证结果分析
英文标题:Analysis of proficiency test results for determination of sorbic acid in health food