Home / Standards / GB 223.61-87 GB 223.61-87 Methods for chemical analysis of iron, steel and alloy — Determination of phosphorus content by ammonium phosphomolybdate volumetric method 钢铁及合金化学分析方法 磷钼酸铵容量法测定磷量 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