凯氏定氮仪测定氮含量的方法讨论  

Discussion on Determination of Nitrogen Content with Kjeldahl Method

作　　者：李静 唐志娟 何建平 胡芳 

机构地区：[1]昆山京昆油田化学科技开发公司,江苏昆山215337

出　　处：《广州化工》2015年第3期135-136,166,共3页GuangZhou Chemical Industry

摘　　要：海能K9860全自动凯氏定氮仪测定样品总氮含量时,其结果的稳定性受到很多因素的影响。基于此原因,我们设计了一系列检测阳离子瓜尔胶的氮含量实验,结果表明：样品质量在0.5-0.7 g之间,催化剂硫酸钾、硫酸铜使用量分别为5 g、0.2 g,消化后加15 m L蒸馏水,该结果稳定性好、误差小。When using Hai Neng Automatic Kjeldahl Analyzer determining total nitrogen content of the samples,there were a number of factors that influence the stability of the results. Based on this reason,a series of experiment was designed to detect the nitrogen content of cationic guar gum. The results showed that the sample quality was between 0. 5 g and 0. 7 g with catalyst potassium sulfate and copper sulfate usage of 5 g,0. 2 g,respectively,15 m L distilled water after digestion. The results had good stability and small error.

关 键 词：凯氏定氮法 阳离子瓜尔胶 氮含量 

分 类 号：O656.32[理学—分析化学]