Home / Standards / GB 6150.5-85 GB 6150.5-85 Methods for chemical analysis of tungsten concentrates — Determination of sulfur content by barium sulfate gravimetric method 钨精矿化学分析方法 硫酸钡重量法测定硫量 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