GB/T 6730.51-2023 Iron ores—Determination of carbon content in carbonate—Caustic asbestos absorption gravimetric method

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 6730.51-1986 Methods for chemical analysis of iron ores The caustic asbestos absorption gravimetric method for the determination of carbon content in carbonate

GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB/T 6730.1-1986 Methods for chemical analysis of iron ores—Preparation of predried test samples for chemical analysis GB/T 6730.1-2016 Iron ores—Preparation of predried test samples for chemical analysis GB/T 6730.3-1986 Methods for chemical analysis of iron ores The gravimetric method for the determination of hygroscopic moisture content in analytical samples GB/T 6730.3-2017 Iron ores—Determination of hygroscopic moisture in analytical samples—Gravimetric,Karl Fischer and mass-loss methods 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