气相色谱法测定室内空气中TVOC的不确定度评定

根据GB／T18883—2002附录C建立气相色谱法测定室内空气中TVOC的不确定度数学模型，从测试程序分析了不确定度的来源，并计算各不确定度分量，得出合成标准不确定度和扩展不确定度。从中可以直观地发现测量TVOC不确定度的主要来源，从而在运用该检测方法时，可以从仪器本身和实验操作过程尽量减少一些不必要的不确定度，使检测结果更加准确。

Uncertainty evaluation of TVOC in air from room by GC measurement

Set up the mathematical model of uncertainty of GC measurement of TVOC according to GB/T 18883-2002,this paper analysed the sources of uncertainty,calculated every portion of uncertainty and gained the combined standard uncertainty as well as the expanded uncertainty.The main sources of uncertainty of GC measurement of TVOC could be found intuitively through these analyses.As a result,some unnecessary uncertainty could be reduced through the apparatus itself and the operational process of experiment when th...