Home / Standards / GB 223.62-87 GB 223.62-87 Steel and alloy—Determination of phosphorus content—Butyl acetate extraction spectrophotometric method 钢铁及合金化学分析方法 乙酸丁酯萃取光度法测定磷量 Standard Type GB ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A