China 'GB/T 23772-2009
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 23772-2009
Inorganic chemicals for industrial use - General method for the determination of total nitrogen content - Nessler’s reagent colorimetric method 无机化工产品中总氮含量测定的通用方法 蒸馏-纳氏试剂比色法
Issued Date:2009-05-13
Implemented Date:2010-01-01
Issued by:
The Standardization Administration of the People's Republic of China