Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of germanium content—Phenylfluorone-cetyltrimethyl ammonium bromide photometric method after carbon tetrachloride extraction
Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of gallium content—Rhodamine B photometric method after butylacetate extraction
Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of gallium content—Rhodamine B photometric method after butylacetate extraction
Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of germanium content—Distillation separation-phenyl fluorone cetyltrimethyl-ammonium bromide phtometric method