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GB/T 10322.6-2004 Iron ore—Determination of decrepitation index 36.0 via email in 1~3 business day valid
GB/T 6730.58-2004 Iron ores—Determination of vanadium content—Flame atomic absorption spectrometric methods 150.0 via email in 1~3 business day abolished
GB/T 6730.10-2014 Iron ores―Determination of silicon content―Gravimetric methods 210.0 via email in 1~3 business day valid
GB/T 6730.28-2006 Iron ores―Determinaton of fluorine content―Ion-selective electrode method 150.0 via email in 1~3 business day valid
GB/T 10322.1-2014 Iron ores―Sampling and sample preparation procedures 910.0 via email in 1~10 business day valid
GB 6730.17-1986 Methods for chemical analysis of iron ores; The combustion iodometric method for the determination of sulfur content 60.0 via email in 1~3 business day abolished
GB/T 6730.31-1986 Methods for chemical analysis of iron ores - The benzoylphenylhydroxylamine extraction photometric method for the determination of vanadium content 60.0 via email in 1~3 business day valid
GB/T 6730.21-2016 Iron ores―Determination of manganse content―Potassium periodate spectrophotometric method 150.0 via email in 1~3 business day valid
GB 6730.20-1986 Methods for the chemical analysis of iron ores; The volumetric method for the determination of phosphorus content 105.0 via email in 1~3 business day valid
GB/T 6730.6-2016 Iron ores―Determination of metallic iron content―Ferric chloride-sodium acetate titrimetric method 150.0 via email in 1~3 business day valid
GB/T 24586-2009 Iron ores—Determination of apparent density,true density and porosity 180.0 via email in 1~3 business day valid
GB/T 6730.56-2004 Iron ores—Determination of aluminum content—Flame atomic absorption spectrometric method 120.0 via email in 1~3 business day valid
GB 6730.21-1986 Method for chemical analysis of iron ores - The potassium periodate photometric method for the determination of manganese content 90.0 via email in 1~3 business day abolished
GB/T 6730.54-2004 Iron ores—Determination of lead content—Flame atomic absorption spectrometric method 80.0 via email in 1 business day valid
GB/T 32545-2016 Division of production grade for iron ores 150.0 via email in 1~3 business day valid
GB 6730.48-1986 Methods for chemical analysis of iron ores; The dethio diantipyryl methane photometric method for the determination of bismuth content 60.0 via email in 1~3 business day valid
GB/T 6730.38-2017 Iron ores--Determination of cobalt content--Nltroso-R salt spectrophotometric method 170.0 via email in 1~3 business day valid
GB/T 6730.18-2006 Iron ores - Determination of phosphorus content - Molybdenum blue spectrophotometric method 180.0 via email in 1~3 business day valid
GB/T 6730.73-2016 Iron ores―Determination of total iron content―EDTA photometric titration method 150.0 via email in 1~3 business day valid
GB/T 6730.59-2017 Iron ores--Determination of manganese content--Flame atomic absorption spectrometric method 240.0 via email in 1~3 business day valid
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