元素分析仪和全自动凯氏定氮仪法测定有机肥总氮含量对比研究  

Comparative Study on the Determination of Total Nitrogen in Organic Fertilizer by Elemental Analyzer and Automatic Kjeldahl Method

作　　者：刘凡 刘大为 马宗虎 张廷军 LIU Fan;LIU Da-wei;MA Zong-hu;ZHANG Ting-jun(China Huadian Engineering Co Ltd, Beijing 100160, China;National Energy Research and Development Center for Production and Utilization of Biomass Gas,Tianjin 301700, China;China Energy Engineering Group Planning and Engineering Co Ltd, Beijing 100120, China)

机构地区：[1]中国华电科工集团有限公司,北京100160 [2]国家能源生物燃气高效制备及综合利用技术研发中心,天津301700 [3]中国能源建设集团规划设计有限公司,北京100120

出　　处：《中国沼气》2022年第1期51-55,共5页China Biogas

基　　金：中国华电集团有限公司重点科技项目(CHDKJ21-01-48);中国华电科工集团有限公司重点科技项目(CHECKJ20-01-07)。

摘　　要：氮含量作为有机肥养分的重要来源,是评价有机肥质量的一项重要指标。文章以普通市售的有机肥料为样品,分别使用元素分析仪和全自动凯氏定氮仪测定有机肥料的全氮含量,为采用两种不同的分析测试方法测定有机肥料全氮含量研究提供可靠的技术支持。样品每个分析测试方法重复测定5次。结果表明:元素分析仪和全自动凯氏定氮仪法测定的有机肥料全氮含量分别为0.597%和0.495%,相对标准偏差分别为0.33%和0.67%。这两种分析方法测定的有机肥料中的全氮含量精密度较高,仪器设备的稳定性较好,两个结果稍有差异。As an important source of organic fertilizer nutrients,nitrogen content is an important index for evaluating the quality of organic fertilizers.In this paper,ordinary commercially available organic fertilizers are used as samples,and the elemental analyzer and automatic Kjeldahl nitrogen analyzer are used to determine the total nitrogen content of organic fertilizers.This provides a reliable method for determining the total nitrogen content of organic fertilizers by using two different analysis and testing methods.Technical support.Each analysis test method of the sample is repeated 5 times.The results showed that the total nitrogen content of organic fertilizers determined by the elemental analyzer and the automatic Kjeldahl nitrogen analyzer were 0.597%and 0.495%,respectively,and the relative standard deviations were 0.33%and 0.67%,respectively.These two analysis methods determine the total nitrogen content in organic fertilizers with high precision and the stability of the instruments and equipment.The two results are slightly different.

关 键 词：元素分析仪 凯氏定氮仪 有机肥料 全氮含量 

分 类 号：S144[农业科学—肥料学] TQ440[农业科学—农业基础科学]