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 (English Version)
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 223.52-1987
Scope
This standard applies to the determination of selenium in stainless steel and ordinary carbon steel. Measuring range: 0.05 to 1.00%. This standard complies with GB1467-78 "General Rules and General Provisions of Standards for Chemical Analysis Methods of Metallurgical Products".
GB/T 223.52-1987 history
1987GB/T 223.52-1987 Methods for chemical analysis of iron,steel and alloy--The hydroxylamine hydrochloride-iodometric method for the determination of selenium content