GB/T 223.51-1987 Methods for chemical analysis of iron,steel and alloy--The 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol photometric method for the determination of zinc content (English Version)
This standard is applicable to the determination of zinc content in iron and steel, superalloys and precision alloys. Measuring range: 0.0015~0.005% This standard complies with GB1467-78 "General Rules and General Provisions of Standards for Chemical Analysis Methods of Metallurgical Products".
GB/T 223.51-1987 history
1987GB/T 223.51-1987 Methods for chemical analysis of iron,steel and alloy--The 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol photometric method for the determination of zinc content