气相色谱法测定沼气中甲烷含量的不确定度计算  

Evaluation of the Uncertainty in Methane Content Determination with Gas Chromatography

作　　者：贺莉[1,2] 冉毅[1,2] 蒋鸿涛 张冀川[1,2] 袁丁[1,2] 陈子爱 

机构地区：[1]农业部沼气科学研究所,成都610041 [2]农业部沼气产品及设备质量监督检验中心,成都610041

出　　处：《中国沼气》2014年第5期50-51,共2页China Biogas

摘　　要：NY/T 1700-2009《沼气中甲烷和二氧化碳的测定气相色谱法》是测定沼气中甲烷含量的标准方法。为找出对该实验检测的主要影响因素,通过分析测试过程,量化不确定度分量,计算合成不确定度和扩展不确定度。实验测量不确定度为5.88%,置信区间为95%的扩展不确定度为11.76%,可为样品检测提供参考。Gas Chromatography system is the standard method for detection of methane in biogas according to NY/T 1700 - 2009. For the sake of finding the main influencing factors, the uncertainties in the detection process were discussed, and source of uncertainty was analyzed. The results showed that the combined uncertainty of factors was 5.88%, while expanded uncertainty was 11.76%.

关 键 词：不确定度 沼气 甲烷 气相色谱法 

分 类 号：S216.4[农业科学—农业机械化工程]