Home / Standards / GB 6150.3-85 GB 6150.3-85 Methods for chemical analysis of tungsten concentrates—The photometric method using salicylfluorone and tetradecylpyridinium chloride for the determination of tin content 钨精矿化学分析方法 水杨基荧光酮-氯化十四烷基吡啶光度法测定锡量 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