China 'GB/T 223.21-1994
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 223.21-1994
Methods for chemical analysis of iron,steel and alloy--The 5-Cl-PADAB spectrophotometricmethod for the determination of cobalt content 钢铁及合金化学分析方法 5-Cl-PADAB分光光度法测定钴量
Issued Date:1994-01-17
Implemented Date:1994-10-01
Issued by:
The Standardization Administration of the People's Republic of China