杜马斯燃烧法与凯氏定氮法测定含氨基酸肥料中氮含量的比较  

Comparison Between Dumas Combustion Method and Kjeldahl Nitrogen Determination Method for Determining Nitrogen Content in Amino Acid Containing Fertilizers

作　　者：班雁华[1] 陈桂鸾[1] 刘晓曈 赵莹莹 BAN Yanhua;CHEN Guiluan;LIU Xiaotong;ZHAO Yingying(Guangxi Zhuang Autonomous Region Center for Analysis and Test Research,Nanning,Guangxi 530022,China)

机构地区：[1]广西壮族自治区分析测试研究中心,广西南宁530022

出　　处：《肥料与健康》2023年第5期73-76,共4页Fertilizer & Health

基　　金：广西壮族自治区分析测试研究中心自主科研项目“分光光度法测定肥料中游离氨基酸含量的研究”(gxat2022zz03)。

摘　　要：为考察凯氏定氮法和杜马斯燃烧法测定肥料中氮含量的差异,以含氨基酸肥料为试验对象,开展了试验研究。结果表明:两种方法测得的氮含量基本一致,无明显差异;肥料中氮质量分数为0.94%~6.03%时,两种方法所得结果的准确度较高,加标回收率为96.6%~104.1%。与凯氏定氮法相比,杜马斯燃烧法测定肥料中氮含量更安全、环保、快捷。In order to investigate the difference between the Kjeldahl nitrogen determination method and the Dumas combustion method in determining the nitrogen content in fertilizers,an experimental study is conducted on amino acid containing fertilizers.The results show that the nitrogen content measured by the two methods is consistent,with no significant difference.When the nitrogen mass fraction in fertilizers is 0.94%-6.03%,the accuracy of the results obtained by the two methods is relatively high,and the recovery rate of spiking is 96.6%-104.1%.Compared with the Kjeldahl nitrogen determination method,the Dumas combustion method is safer,more environmentally friendly,and faster in determining the nitrogen content of fertilizers.

关 键 词：氮 杜马斯燃烧法 凯氏定氮法 含氨基酸肥料 

分 类 号：O659.2[理学—分析化学]