Home / Standards / GB/T 223.11-91 GB/T 223.11-91 Steel and alloy—Determination of chromium content by ammonium persulfate oxidation volumetric method 钢铁及合金化学分析方法 过硫酸按氧化容里法测定铬量 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A