以TCD检测器为例进行分析，对气相色谱仪检定结果的不确定度进行评定，相对扩展不确定度为5%。
The detector TCD was taken as example, the relative expanded uncertainty of verification of chromatography was 5%.
计算得到该方法测量结果的相对标准扩展不确定度为4.4%。
The relative standard expanded uncertainty of measured results by using said method was 4.4%.
该扩展不确定是相对不确定度吗？
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