农用尿素中水分含量测定不确定度的评定

Evaluation of the measurement uncertainty on moisture content in agricultural urea

利用瑞士万通831KF型水分测定仪测定了农用尿素中的水分,依据JJF1059-1999对尿素水分测试过程中的测定不确定度分量进行了分析和评定。该测定过程中所产生的不确定度主要由样品测定的重复性和水分测定仪检定的不确定度所决定。尿素水分含量测定结果的扩展不确定度为0.01%。

The moisture content in agricultural urea was detected by the Metrohm 831KF moisture analyzer, and analyzed the uncertainty components of testing process on it by JJF 1059-1999. This produced uncertainty was determinated on the uncertainty of repeatability and the calibration of moisture analyzer. The measurement extended uncertainty of moisture content in urea was 0.01%.