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 6730.51-2023 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 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 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 15000.3-1994 Directives for the work of reference materials(3) General principles and statistic methods for certification of reference materials GB/T 15000.3-2008 Directives for the work of reference materials(3)—Reference materials—General and statistical principles for certification GB/T 15000.3-2023 Directives for the work of reference materials—Part 3:Reference materials—Characterization and assessment of homogeneity and stability GB/T 16597-1996 Analytical methods of metallurgical products General rule for X-ray fluorescence spectrometric methods GB/T 16597-2019 Analytical methods of metallurgical products—General rule for X-ray fluorescence spectrometric methods JJG 810-1993 Wavelength Dispersive X-Ray Fluorescence Spectrometers YB/T 082-1996 Specification for CRMs for metallurgical product analysis YB/T 082-2016 Metallurgical product analysis standard sample technical specification