China 'GB/T 223.42-1985
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 223.42-1985
Methods for chemical analysis of iron,steel and alloy--The anion-exchange separation-bromopyrogallol red photometric method for the determination of tantalumcontent 钢铁及合金化学分析方法 离子交换分离-溴邻苯三酚红光度法测定钽量
Issued Date:1985-07-18
Implemented Date:1986-06-01
Issued by:
The Standardization Administration of the People's Republic of China