GB/T 36704-2018 Iron ore concentrate

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 6730.10-1986 Methods for chemical analysis of iron ores The gralimetric method for the determination of silicon content GB/T 6730.10-2014 Iron ores—Determination of silicon content—Gravimetric methods 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 6730.11-2025 Iron ores—Determination of aluminium content—EDTA titrimetric method GB/T 6730.12-1986 Methods for chemical analysis of iron ores The chrome azurol S photometric method for the determination of aluminum content GB/T 6730.12-2016 Iron ores—Determination of aluminum content—Chrome azurol S spectrophotometric 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 6730.17-1986 Methods for chemical analysis of iron ores The eombustion iodometric method for the determination of sulfur content GB/T 6730.17-2014 Iron ores—Determination of sulfur content—Combustion iodometric 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 6730.19-1986 Methods for chemical analysis of iron ores The bismuth phosphomolybdate blue photometric method for the determination of phosphorus content GB/T 6730.19-2016 Iron ores—Determination of phosphorus content—Bismuth phosphomolybdate blue spectrophotometric method GB/T 6730.20-1986 Methods for the chemical analysis of iron ores The volumetric method for the determination of phosphorus content GB/T 6730.20-2016 Iron ores—Determination of phosphorus content—Titrimetric method GB/T 6730.22-1986 Methods for chemical analysis of iron ores The diantipyrine methane photometric method for the determination of titanium content GB/T 6730.22-2016 Iron ores—Determination of titanium content—Diantipyrylmethane spectrophotometric method GB/T 6730.23-1986 Methods for chemical analysis of iron ores The ferric ammonium sulfate volumetric method for the determination of titanium content GB/T 6730.23-2006 Iron ores—Determination of titanium content—The ferric ammonium sulfate titrimetric method GB/T 6730.23-2025 Iron ores—Determination of titanium content—The ferric ammonium sulfate titrimetric method GB/T 6730.24-1986 Methods for chemical analysis of iron ores The arsenazo Ⅲ photometric method for the determination of rare earth elements content GB/T 6730.24-2006 Iron ores—Determination of total rare earth contents—Chlorophosphonazo mA spectrophotometric method GB/T 6730.24-2025 Iron ores—Determination of total rare earth contents—Arsenazo Ⅲ spectrophotometric method GB/T 6730.25-1986 Methods for the chemical analysis of iron ores—The gravimetric method for the determination of rare earth elements content GB/T 6730.25-2006 Iron ores—Determination of total rare earth contents—Oxalate gravimetric method GB/T 6730.25-2021 Iron ores—Determination of total rare earth contents—Oxalate gravimetric method GB/T 6730.26-1986 Methods for chemical analysis of iron ores The thorium nitrate volumetric method for the determination of fluorine content GB/T 6730.26-2017 Iron ores—Determination of fluorine content—Thorium nitrate titrimetric method GB/T 6730.27-1986 Methods for chemical analysis of iron ores The lanthanum-alizarin complexon photometric method for the determination of fluorine content GB/T 6730.27-2017 Iron ores—Determination of fluorine content—Lanthanum-alizarin complexion spectrophotometric method GB/T 6730.28-1986 Methods for chemical analysis of iron ores The ion-selective electrode method for the determination of fluorine content GB/T 6730.28-2006 Iron ores—Determination of fluorine content—Ion-selective electrode method GB/T 6730.28-2021 Iron ores—Determination of fluorine content—Ion-selective electrode method GB/T 6730.31-1986 Methods for chemical analysis of iron ores The benzoylphenyl-hydroxylamine extraction photometric method for the determination of vanadium content GB/T 6730.31-2017 Iron ores—Determination of vanadium—N-benzoyl-N-phenylhydroxylamine extraction spectrophotometric method GB/T 6730.32-1986 Methods for chemical analysis of iron ores The ferrous sulfate volumetric method for the determination of vanadium content GB/T 6730.32-2013 Iron ores—Determination of vanadium content—The ammonium ferrous sulfate titrimetric 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 6730.45-2025 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 6730.46-2025 Iron ores—Determination of arsenic content—Arseno-molybdenum blue spectrophotometric method after the distillation separation GB/T 6730.49-1986 Methods for chemical analysis of iron ores The flame atomic absorbtion spectrophotometric method for the determination of sodium and potassium content GB/T 6730.49-2017 Iron ores—Determination of potassium content—Flame atomic absorption spectrometric method 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 6730.58-2004 Iron ores—Determination of vanadium content—Flame atomic absorption spectrometric methods GB/T 6730.58-2017 Iron ores—Determination of vanadium content—Flame atomic absorption spectrometric method GB/T 6730.61-2005 Iron ores—Determination of carbon and sulfur content—High frequency combustion with infrared absorption method GB/T 6730.61-2022 Iron ores—Determination of carbon and sulfur content—High frequency combustion with infrared absorption method GB/T 6730.62-2005 Iron ores—Determination of calcium,silicon,manganese,titanium,phosphorus magnesium,aluminium and barium content—Wavelength dispersive X-ray fluorescence spectrometric method GB/T 6730.63-2006 Iron ores—Determination of aluminum,calcium,magnesium,manganese,phosphorus,silicon and titanium content—Inductively coupled plasma atomic emission spectrometric method GB/T 6730.63-2024 Iron ores—Determination of aluminum,calcium,magnesium,manganese,phosphorus,silicon and titanium content—Inductively coupled plasma atomic emission spectrometric method GB/T 6730.65-2009 Iron ores—Determination of total iron content—Titanium(Ⅲ) chloride reduction potassium dichromate titration methods(routine methods) GB/T 6730.66-2009 Iron ores—Determination of total iron content—Automatic potentiometric titration method GB/T 6730.67-2009 Iron ores—Determination of arsenic content—Hydride generation atomic absorption spectrometric method GB/T 6730.75-2017 Iron ores—Determination of sodium 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 10322.1-2000 Iron ores—Sampling and sample preparation procedures GB/T 10322.1-2014 Iron ores—Sampling and sample preparation procedures GB/T 10322.1-2023 Iron ores—Sampling and sample preparation procedures GB/T 10322.5-2000 Iron ores—Determination of moisture content of a consignment GB/T 10322.5-2016 Iron ores—Determination of the moisture content of a lot GB/T 10322.5-2024 Iron ores—Determination of the moisture content of a lot GB/T 10322.7-2004 Iron ore—Determination of size distribution by sieving GB/T 10322.7-2016 Iron ores and direct reduced iron—Determination of size distribution by sieving