色谱法测定N_2O_4、MON中相当水含量的不确定度评定

为确定气相色谱法测定四氧化二氮(N2O4)、绿色四氧化二氮(MON)中相当水含量的不确定度,按照GJB1964—1994、GJB1673—1993中规定的色谱法测量相当水含量的方法,用SC-200气相色谱仪测定N2O4相当水含量,应用测定数据进行标准不确定度、合成不确定度、扩展不确定度的分析和评定。合成标准不确定度为0.0327%,扩展不确定度为0.065%(包含因子k=2)。

Uncertainty Evaluation of Equivalent Water Content in N2O4 and MON by Chromatography

In order to determine the uncertainty of the equivalent water content in dinitrogen tetroxide（N2O4） and MON by gas chromatography method, the equivalent water content of N2O4 was measured by SC-200 gas chromatograph apparatus according to the equivalent water content chromatography measurement method provided by GJB 1964-1994 and GJB 1673 - 1993. The standard uncertainty, combined uncertainty, expanded uncertainty were analyzed and evaluated applying the measured data. The combined standard uncertainty is 0.0327%, the expanded uncertainty is 0.065% （coverage factor k = 2）.