GB/T 24220-2009

GB/Z 42358-2023 Iron ores—Wavelength dispersive X-ray fluorescence spectrometers—Determination of precision GB/Z 42521-2023 Iron ores—Recommended procedures for iron ore dissolution using either acid digestion or alkali fusion GB/Z 42520-2023 Guidelines for X-ray fluorescence spectrometric laboratory practice for the analysis of iron ores GB/T 3714-1983 Technical requirements of manganese carbonate orepowder 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 6730.16-1986 Methods for chemical analysisof iron ores--The barium sulfate gravimetric method for the determination of sulfur content GB/T 6730.20-1986 Methods for chemical analysis of iron ores--The volumetric method for the determination of phosphorus content GB/T 6730.31-1986 Methods for chemical analysis of iron ores--The N-benzoylphenyl-hydroxylamine extraction photometric method for the determination of vanadium content