依据新规范对柔肤水相对密度的不确定度评定

目的：院建立密度瓶法测定柔肤水相对密度不确定度评定的方法。方法院依据JJF1059.1-2012《测量不确定度评定与表示》，采用GB/T 13531.4要2013《化妆品通用检验方法相对密度的测定》，建立测量模型，绘制不确定度来源因果图，对检测过程中引入的不确定度进行了分类和量化，得到扩展不确定度U=0.0002。结果院柔肤水相对密度测定结果表示为1.0097±0.0002。结论院研究为相对密度测定的不确定度评定提供参考依据。

Evaluation on the Uncertainty of Relative Density of Smoothing Toner According to New Specification

Objective：To establish density bottle method to evalu-ate uncertainty in determination of relative density of smoothing toner. Method：According to JJF1059.1-2012 evaluation and ex-pression of uncertainty in measurement and GB/T 13531.4 2013 general methods on determination of cosmetics-determination of relative density, measurement model was established, and cause-effect diagram of sources of uncertainty was drawn up, and each component of uncertainty was calculated and classified, the expanded uncertainty was U=0.0002. Result：The results of rela-tive density of smoothing toner was 1.009 7±0.000 2. Conclu-sion：The study can provide reference basis for uncertainty eval-uation in determination of relative density.