GB/T 25953-2010 Nonferrous metals mineral processing and iron concentrate recovering

GB/T 2460-1996 Pyrites and concentrate—Methods for sampling and preparation sample GB/T 6730.2-1986 Methods for chemical analysis of iron ores Gravimetric method for the determination of moisture content GB/T 6730.2-2018 Iron ores—Determination of moisture content—Gravimetric method GB/T 6730.5-1986 Methods for chemical analysis of iron ores The titanium chloride-potassium dichromate volumetric method for the determination of total iron content GB/T 6730.5-2007 Iron ores—Determination of total iron content—Titanium(Ⅲ)chloride reduction methods GB/T 6730.5-2022 Iron ores—Determination of total iron content—Titrimetric methods after titanium(Ⅲ) chloride reduction GB/T 6730.9-1986 Methods for chemical analysis of iron ores The silicomolybdic blue photometric method for the determination of silicon content GB/T 6730.9-2006 Iron ores—Determination of silicon contents—The silicomolybdic blue spectrophotometric method reduce by ammonium ferrous sulfate GB/T 6730.9-2016 Iron ores—Determination of silicon content—Silicomolybdic blue spectrophotometric method reduced by ammonium ferrous sulfate GB/T 6730.11-1986 Methods for chemical analysis of iron ores The fluoride replacement complexometric method for the determination of aluminum content GB/T 6730.11-2007 Iron ores—Determination of aluminium content—EDTA titrimetric method GB/T 6730.16-1986 Methods for chemical analysis of iron ores The barium sulfate gravimetric method for the determination of sulfur content GB/T 6730.16-2016 Iron ores—Determination of sulfur content—Barium sulfate gravimetric method GB/T 6730.18-1986 Methods for chemical analysis of iron ores The n-butyl acetate extraction-molybdenum blue photometric method for the determination of phosphorus content GB/T 6730.18-2006 Iron ores—Determination of phosphorus content—Molybdenum blue spectrophotometric method GB/T 6730.35-1986 Methods for chemical analysis of iron ores The oxalic acid bis-cyclohexylidene hydragide (cuprizone) photometric method for the determination of copper content GB/T 6730.35-2016 Iron ores—Determination of copper content—Oxalic acid bis-cyclohexylidene hydragide(cuprizone) spectrophotometric method GB/T 6730.36-1986 Methods for chemical analysis of iron ores The flame atomic absorption spectrophotometric method for the determination of cupper content GB/T 6730.36-2016 Iron ores—Determination of copper content—Flame atomic absorption spectrometric method GB/T 6730.45-1986 Methods for chemical analysis of iron ores The diethyldithiocar bamic acid Ag salt photometric method for the determination of arsenic content GB/T 6730.45-2006 Iron ores—Determination of arsenic content—Arseno-molybdenum blue spectrophotometric method after hydrogen arsenide separation GB/T 6730.46-1986 Methods for chemical analysis of iron ores The extraction separation-molybdenum blue photometric method for the determination of arsenic content GB/T 6730.46-2006 Iron ores—Determination of arsenic content—Arseno-molybdenum blue spectrophotometric method after the distillation separation GB/T 6730.56-2004 Iron ores—Determination of aluminum content—Flame atomic absorption spectrometric method GB/T 6730.56-2019 Iron ores—Determination of aluminum content—Flame atomic absorption spectrometric method GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 6730.45-2025 Iron ores—Determination of arsenic content—Arseno-molybdenum blue spectrophotometric method after hydrogen arsenide separation GB/T 6730.11-2025 Iron ores—Determination of aluminium content—EDTA titrimetric method GB/T 6730.46-2025 Iron ores—Determination of arsenic content—Arseno-molybdenum blue spectrophotometric method after the distillation separation