凯氏定氮法测定沼液中有机氮含量的不确定度计算  

Uncertainty of Kjeldahl Method in Organic Nitrogen Determination for Biogas Slurry

作　　者：贺莉[1,2] 张冀川[1,2] 袁丁[1,2] 丁自立[1,2] 

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6期51-52,共2页China Biogas

摘　　要：利用凯氏定氮法测定沼液中有机氮含量测定过程简便、快捷。为了减少实验误差,提高实验精确度,找出实验的主要影响因素,文章对凯氏定氮法的不确定度进行分析和评定。实验结果表明其合成不确定度为2.44%,扩展不确定度为4.88%。The detection of organic nitrogen by Kjeldahl apparatus is simple and efficient. For the purpose of reducing experiment error and improving precision, the uncertainties in the determination were analyzed and evaluated. The results showed that combined uncertainty was 2.44% and expanded tmcertainty was 4.88%.

关 键 词：不确定度 沼液 凯氏定氮法 有机氮测定 

分 类 号：S216.4[农业科学—农业机械化工程]