GB/T 36859-2018
Determination of urea content in feed
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 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
SN/T 0840-2015
GB/T 35996-2018(\u82f1\u6587\u7248)
磷矿石和磷精矿中八种元素含量的快速测定 X射线荧光光谱法
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
DB37/T 2121-2012
GB/T 2441.4-2010
Determination of urea - Part 4: Iron content 1,10 - Phenanthroline spectrophotometric method
SN/T 3810-2014
Determination of nitrogen content in urea and ammonium sulphate - X-ray fluorescence spectrometry
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 3598-1983
Fertilizers—Determination of urea nitrogen content—Urease method