白砂糖蔗糖分检测的不确定度评定

摘要

The uncertainty determination of sucrose in white granulated sugar by polarimetry was evaluated. The results showed that main uncertainty components arose from constant volume process and precision of polarimeter. When the sucrose value was 99.71%, the expanded uncertainty value was 0.02%, results could be expressed as 99.71%±0.02%,k=2,P=95%.%分析旋光法测定白砂糖中蔗糖分的不确定度来源，对不确定度的各个分量进行评估和合成。结果表明，影响蔗糖分测定不确定度的主要原因是定容体积和旋光仪精度引入的不确定度分量。当白砂糖中蔗糖分的测定值为99.71%时，扩展不确定度为0.02%，测定结果表示为99.71%±0.02%，k=2，P=95%。