YB/T 421-1992 Iron sintered ore

YB 421-1977

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 6730.47-1986 Methods for chemical analysis of iron ores—The sulfochlorophenol S photometric method for the determination of niobium content GB/T 6730.47-2017 Iron ores—Determination of niobium content—Sulfochlorophenol S spectrophotometric method GB/T 6730.48-1986 Methods for chemical analysis of iron ores The dithio diantipyryl methane photometric method for the determination of bismuth content GB/T 6730.48-2021 Iron ores—Determination of bismuth content—Dithiodiantipyryl methane spectrophotometric method 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 6730.50-1986 Methods for chemical analysis of iron ores The gas volumetric method for the determination of total carbon content GB/T 6730.50-2016 Iron ores—Determination of carbon content—Gas volumetric method GB/T 6730.51-1986 Methods for chemical analysis of iron ores The caustic asbestos absorption gravimetric method for the determination of carbon content in carbonate GB/T 6730.51-2023 Iron ores—Determination of carbon content in carbonate—Caustic asbestos absorption gravimetric method GB/T 6730.52-2004 Iron ores—Determination of cobalt content—Flame atomic absorption spectrometric method GB/T 6730.52-2018 Iron ores—Determination of cobalt content—Flame atomic absorption spectrometric method GB/T 6730.53-2004 Iron ores—Determination of zinc content—Flame atomic absorption spectrometric method GB/T 6730.54-2004 Iron ores—Determination of lead content—Flame atomic absorption spectrometric method GB/T 6730.55-2004 Iron ores—Determination of tin content—Flame atomic absorption spectrometric method GB/T 6730.55-2019 Iron ores—Determination of tin 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 6730.57-2004 Iron ores—Determination of chromium 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 6730.59-2005 Iron ores—Determination of manganese content—Flame atomic absorption spectrometric method GB/T 6730.59-2017 Iron ores—Determination of manganese content—Flame atomic absorption spectrometric method GB/T 6730.60-2005 Iron ores—Determination of nickel content—Flame atomic absorption spectrometric method GB/T 6730.60-2022 Iron ores—Determination of nickel 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 6730.64-2007 Iron ores—Determination of water soluble chloride content—Ion-selective electrode method GB/T 6730.64-2022 Iron ores—Determination of water soluble chloride content—Ion-selective electrode 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 6730.68-2009 Iron ores—Determination of loss on ignition—Gravimetric method GB/T 6730.69-2010 Iron ores—Determination of fluoride and chloride content—Ion chromatography GB/T 6730.70-2013 Iron Ores—Determination of total iron content—Titrimetric method after tin(Ⅱ) chloride reduction GB/T 6730.71-2014 Iron ores—Determination of acid-soluble iron(Ⅱ) content—Titrimetric method GB/T 6730.72-2016 Iron ores—Determination of arsenic,chromium,cadmium,lead and mercury content—Inductively coupled plasma-mass spectrometry method (ICP-MS) GB/T 6730.73-2016 Iron ores—Determination of total iron content—EDTA photometric titration method GB/T 6730.73-2024 Iron ores—Determination of total iron content—EDTA photometric titration method GB/T 6730.74-2017 Iron ores—Determination of magnesium content—Flame atomic absorption spectrometric method GB/T 6730.75-2017 Iron ores—Determination of sodium content—Flame atomic absorption spectrometric method GB/T 6730.76-2017 Iron ores—Determination of potassium,sodium,vanadium,copper,zinc,lead,chromium,nickel,cobalt elements—Inductively coupled plasma optical emission spectrometry GB/T 6730.77-2019 Iron ores—Determination of arsenic content—Hydride generation-atomic fluorescence spectrometric method GB/T 6730.78-2019 Iron ores—Determination of cadmium content—Graphite furnace atomic absorption spectrophotometric method GB/T 6730.79-2019 Iron ores—Determination of cadmium content—Hydride generation-atomic fluorescence spectrometric method GB/T 6730.80-2019 Iron ores—Determination of mercury content—Cold atomic absorption spectrometric method GB/T 6730.81-2020 Iron ores—Determination of multiple trace elements—Inductively coupled plasma mass spectrometric method GB/T 6730.82-2020 Iron ores—Determination of barium content—EDTA titrimetric method GB/T 6730.83-2022 Iron ores—Determination of loss on ignition—Gravimetric method corrected by hygroscopic water GB/T 6730.84-2023 Iron ores—Determination of total rare earth content—Inductively coupled plasma atomic emission spectrometric method GB/T 6730.85-2023 Iron ores—Preparation and certification of certified reference materials for use in chemical analysis GB/T 6730.86-2023 Iron ores—Determination of radionuclides—Inductively coupled plasma-mass spectrometric method GB/T 6730.87-2023 Iron ores—Determination of total iron and other multi-element content—Wavelength dispersive X-ray fluorescence spectrometry (cobalt internal standard method) GB/T 6730.88-2024 Iron ores—Determination of chlorine content—X-ray fluorescence spectrometric method GB/T 6730.89-2024 Iron ores—Determination of thorium content—Arsenazo Ⅲ spectrophotometric method GB/T 6730.90-2025 Iron ores—Determination of gold,silver,platinum,palladium contents—Inductively coupled plasma mass spectrometry method GB 8209 GB/T 10122-1988 Iron ores (sinter and pellets)—Sampling and sample preparation for physical testing 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 10322.2-2000 Iron ores—Experimental methods for evaluation of quality variation GB/T 10322.3-2000 Iron ores—Experimental methods for checking the precision of sampling GB/T 10322.3-2024 Iron ores—Experimental methods for checking the precision of sampling GB/T 10322.4-2000 Iron ores—Experimental methods for checking the bias of sampling GB/T 10322.4-2014 Iron ores—Experimental methods for checking the bias of sampling 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 10322.6-2004 Iron ore—Determination of decrepitation index GB/T 10322.6-2022 Iron ores for blast furnace feedstocks—Determination of the decrepitation index 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 GB/T 10322.8-2009 Iron ores—Single-point determination of specific surface area—Nitrogen adsorption method GB/T 10322.9-2023 Iron ores—Determination of specific surface area—Test method using air-permeability apparatus(Blaine) GB/T 13241-1991 Iron ores—Determination of reducibility GB/T 13241-2017 Iron ores—Determination of reducibility GB/T 13242-1991 Iron ores—Low-temperature disintegration test—Method using cold tumbling after static reduction GB/T 13242-2017 Iron ores—Low-temperature disintegration test—Method using cold tumbling after static reduction