Home / Standards / GB/T 223.51-1987 GB/T 223.51-1987 Active 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 钢铁及合金化学分析方法 5-Br-PADAP 光度法测定锌量 Standard Type GBT ICS 77.080 CCS H11 Status 现行 Issue Date 1987-05-12 Implementation 1988-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A