GB/T 36859-2018
Determination of urea content in feed
EN 15750:2009
\u0413\u041e\u0421\u0422 EN 15750-2016
Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
GB/T 33401-2016
Determination of the urea in liquid fluorescent whitening agent products
GB/T 29661-2013
Determination of urea content in cosmetics - Enzymatic method
GB/T 13748.20-2009(\u82f1\u6587\u7248)
镁及镁合金化学分析方法 第20部分:ICP-AES测定元素含量
GB/T 13748.21-2009(\u82f1\u6587\u7248)
镁及镁合金化学分析方法 第21部分:光电直读原子发射光谱分析方法测定元素含量
GB/T 2441.1-2008
Determination of urea - Part 1:Total nitrogen content
GB/T 2602-2002
Method for the urea determinationof m-cresol content of phenol products
BS 5551-4.1.5:1993
Fertilizers. Chemical analysis. Determination of nitrogen.-Method for determination of urea nitrogen content (gravimetric method using xanthydrol)
SN/T 0840-2015
GB/T 2947-2002
Determination of free water in urea and ammonium nitrate by karl fischer method
GB/T 2441.6-2010
Determination of urea - Part 6: Water insoluble matter content - Weight method
DB23/T 1382-2010
GB/T 2441.8-2010
Determination of urea - Part 8: Sulphate content - Visible turbidimetric method
GB/T 42307-2023
Fertilizers and soil conditioners—Determination of biuret content of urea-based fertilizers—HPLC method
GB/T 2441.2-2010
Determination of urea - Part 2: Biuret content - Spectrophotometric method
GB/T 2441.1-2001
Determination of urea—Determination of total nitrogen content
GB/T 2441.9-2010
Determination of urea - Part 9: Methylenediurea content - Spectrophotometric method
DB23/T 1578-2014