Home / Standards / GB 4701.4-84 GB 4701.4-84 Methods for chemical analysis of ferrotitanium—The persulfate-arsenite volumetric method for the determination of manganese content 钛铁化学分析方法 过硫酸盐-亚砷酸盐容量法测定锰量 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