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GB/T 6730.1-2016 Iron ores―Preparation of predried test samples for chemical analysis $100.00 via email in 1~3 business day valid
GB/T 6730.10-2014 Iron ores―Determination of silicon content―Gravimetric methods $220.00 via email in 1~3 business day valid
GB/T 6730.11-2007 Iron ores—Determiantion of aluminium content—EDTA titrimetric method $150.00 via email in 1~3 business day valid
GB/T 6730.12-2016 Iron ores-Determination of aluminum content- Chrome azurol S spectrophotometric method $60.00 via email in 1~3 business day valid
GB/T 6730.13-1986 Methods for chemical analysis of iron ores--The potassium permanganate volumetric method for the determination of calcium content $220.00 via email in 1~3 business day valid
GB/T 6730.13-2007 Iron ores—Determination of calcium and magnesium content—EGTA-CyDTA titrimetric method $150.00 via email in 1~3 business day valid
GB/T 6730.14-2017 Iron ores - Determination of calcium content - Flame atomic absorption spectrometric method $160.00 via email in 1~3 business day valid
GB/T 6730.15-1986 Methods for chemical analysis of iron ores; The complexometric method for the determination of magnesium content $184.00 via email in 1~3 business day superseded
GB/T 6730.16-2016 Iron ores一Determination of sulfur content一Barium sulfate gravimetric method $60.00 via email in 1~3 business day valid
GB/T 6730.17-2014 Iron ores―Determination of sulfur content―Combustion iodometric method $160.00 via email in 1~3 business day valid
GB/T 6730.18-1986 Methods for chemical analysis of iron ores; The n-butyl acetate extraction-molybdenum blue photometric method for the determination of phosphorus content $184.00 via email in 1~3 business day superseded
GB/T 6730.18-2006 Iron ores - Determination of phosphorus content - Molybdenum blue spectrophotometric method $180.00 via email in 1~3 business day valid
GB/T 6730.19-2016 Iron ores―Determination of phosphorus content―Bismuth phosphomolybdate blue spectrophotometric method $60.00 via email in 1~3 business day valid
GB/T 6730.2-2018 Iron ores—Determination of moisture content—Gravimetric method $80.00 via email in 1~3 business day valid
GB/T 6730.20-2016 Iron ores-Determination of phosphorus content--Titrimetric method $160.00 via email in 1~3 business day valid
GB/T 6730.21-2016 Iron ores―Determination of manganse content―Potassium periodate spectrophotometric method $160.00 via email in 1~3 business day valid
GB/T 6730.22-2016 Iron ores―Determination of titanium content―Diantipyrylmethane spectrophotometric method $160.00 via email in 1~3 business day valid
GB/T 6730.23-1986 Methods for chemical analysis of iron ores; The ferric ammonium sulfate volumetric method for the determination of titanium content $260.00 via email in 1~3 business day superseded
GB/T 6730.23-2006 Iron ores - Determination of titanium content - The ferric ammonium sulfate titrimetric method $180.00 via email in 1~3 business day valid
GB/T 6730.24-1986 Methods for chemical analysis of iron ores; The arsenazo 3 photometric method for the determination of rare earth elements content $60.00 via email in 1~3 business day superseded
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