尿素中总氮含量测定的不确定度评定

Uncertainty evaluation on determination of total nitrogen in urea

本文论述了在尿素中总氮含量测定过程中不确定度产生的原因及计算方法。结果表明:在测定过程中,滴定终点引起的不确定度可忽略,其它过程应提高操作人员技能,避免或降低不确定度的产生。

The cause to uncertainty and method of calculation in determination of total nitrogen in urea were discussed. The results showed that the uncertainty from end point of titration could be ignored, but the uncertainty should be avoided or reduced by advancing skills of operateors in operational process.