China 'GB/T 223.52-1987
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 223.52-1987
Methods for chemical analysis of iron,steel and alloy--The hydroxylamine hydrochloride-iodometric method for the determination of selenium content 钢铁及合金化学分析方法 盐酸羟胺-碘量法测定硒量
Issued Date:1987-05-12
Implemented Date:1988-03-01
Issued by:
The Standardization Administration of the People's Republic of China