China 'GB/T 223.49-1994
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 223.49-1994
Methods for chemical analysis of iron,steel and alloy--Extraction separation-chlorophosphonazo mA spectro-photometric method for the determination of the total rare earth content 钢铁及合金化学分析方法 萃取分离-偶氮氯膦mA分光光度法测定稀土总量
Issued Date:1994-09-26
Implemented Date:1995-06-01
Issued by:
The Standardization Administration of the People's Republic of China