现代农业科技Issue(14)：204-205,2.
2种植株全氮测定方法比较
Comparison of Determining the Plant Total Nitrogen with Two Methods
高凤梅 1武际2
作者信息
- 1. 安徽农业大学理学院,安徽合肥230036
- 2. 安徽省农业科学院土壤肥料研究所
- 折叠
摘要
Abstract
The determination of the plant total nitrogen has been compared with Kjeldahl method and Nessler calorimetry method.Twenty mature rapeseed samples were digested with H2SO4 and HClO4,and the sample solution of total nitrogen content was determined by the two methods, respectively.Exogenous standard substance （NH4）2SO4 was added to compare the analytical accuracy and precision.The results showed that the Kjeldahl method for the determination of value was lower than the value of the Nessler colorimetric method, and the recovery rate of the Kjeldahl method was higher than that of Nessler eolorimetry. Kjeldahl method had good reproducibility,it was suitable for accurate analysis of small amounts of sample or a separate determination of total nitrogen content, Nessler colorimetry was easy to operate, and the accuracy could meet the routine analysis requirements, it was suitable for the analysis on a large scale.关键词
凯氏定氮/奈氏比色/加标回收率/植株全氮Key words
Kjeldahl method/Nessler colorimetry/spiked recoveries/plant total nitrogen分类
化学化工引用本文复制引用
高凤梅,武际..2种植株全氮测定方法比较[J].现代农业科技,2012,(14):204-205,2.
