化妆品中柠檬酸检测能力验证结果分析

Analysis of proficiency test results of determination of citric acid in cosmetics

中文关键词:  能力验证  化妆品  柠檬酸  高效液相色谱法

英文关键词:proficiency testing  cosmetics  citric acid  high performance liquid chromatography

中文摘要:

      目的 考察相关实验室检测化妆品中柠檬酸的技术能力和水平, 促进参加实验室对该类项目检验能力的提高。方法 样品通过均匀性和稳定性评价后, 采用随机单盲方式分配至参与能力验证(proficiency testing, PT)的实验室。统计各参加实验室的测定结果, 进行稳健统计分析, 通过Z比分数评价实验室检测能力。结果 制备的200瓶样品均匀性符合要求且在整个计划周期内保持稳定, 满足能力验证计划要求。从参加的31家的结果来看, 共有27家满意, 满意率为87.1%。结论 化妆品中柠檬酸的检测水平总体良好, 个别实验室检测能力有待提高。

英文摘要:

      Objective To investigate the technical ability and level of detecting citric acid in cosmetics, and promote the ability of participating laboratories to test such items. Methods The homogeneity and stability of the samples were examined. The samples were randomly and single blindly distributed to the laboratories participating in the proficiency testing (PT). Results from different laboratories were collected and analyzed using robust statistic analysis, and the proficiency of the participant laboratories was evaluated by Z score. Results The 200 bottles of prepared samples were homogeneous and stable in the whole program period, which met the requirement of PT. Total 27 laboratories among the 31 laboratories participating in the proficiency testing had satisfactory results, with satisfaction rate of 87.1%. Conclusion The detection level of citric acid in cosmetics is generally good, and the detection ability of individual laboratories needs to be improved.